Twitter callback URL does not fire

[alexda12]

Thanks for the plugin. I see you have updated both Facebook and twitter to handle the deprecated API'S. In using TWITTER - I get my TWITTER login showing but after I authenticate - my app is not returned to.

I just get stuck on :

Twitter has been configured properly and I have these callbacks :

info.plist has also been setup with the twitter key in UrlSchemes :

My project is an OBJ-C iOS project using default AppDelegate.

Is there anything else that needs to be configured to get the twitter callback redirecting back to my app with your plugin ?

[Andrious]

Sure.
Let's see what we can do to resolve this. Now, of course, I have NO IDEA what you're app looks like. Possibly when it does successfully signed in, you can 'rebuild the screen' again. Your app will refresh, note you're now logged in, and continue on in your app. No?

Note the funciton, signInFunc(), in the then clause:

signInFunc() is a simple function that merely 'refreshes' the State object's build() function and maybe, if you're testing if the user is logged in or not, the app will refresh and continue. You can ignmore most of its contents. It's just the setState() function that peforms the 'refresh.'

[alexda12]

Thank you for the fast response .. I understand completely what you have written but unfortunately - we dont get to that stage .. i.e please see this snapshot :

[Andrious]

Oh, I see.

My next suggestion would be to view your logcat while attempting the login. Possibly it's complaining about the 'keys' used.

As you know, my library package recently switched to an alternative plugin, flutter_login_facebook 0.1.2+3. If you don't see anything in the logcat, you may have to post an issue with the plugin author. I myself have had no such issue so far.

Greg.

[bpaul7101]

@Andrious , I also have the same issue with your plugin. Twitter auth does not come back after you get successfully authenticated. Running the plugin outside of YOUR plugin works. Running your plugin that uses the TWITTER login plugin doesnt work.

There is nothing wrong with keys/auth secret as next time I run the app - i'm authenticated and I can see the Twitter token. The issue appears to be with callback not working within your plugin.

[bpaul7101]

@Andrious

I forgot to mention, your plugin works (Twitter) when I use Android. Just doesnt work with iOS. I'm also using an Objective C iOS project.

[Andrious]

Ah! Interesting. @alexda12 , would that be the case with you as well? Are you having this issue in iOS and not Android?

[ssbaval]

Hi - I'm trying to get google, facebook, twitter etc working with this Plugin and I'm having issues with the plugin. in iOS - after I type in my password and get a successful message from the relevant provider (say twitter) - nothing happens. I can only go back to my app if I press the DONE button at the top left corner of the device. Doing this actually CANCEL's the login flow. The issue only happens with iOS and works perfectly in Android. Please advise what I need to do to get this to work.

[Andrious]

Having compiled the authentication_app on my Macbook, the library plugin, Auth, worked like a charm. Note, I'm using the twitterkit-{consumer/api key}://
For example: twitterkit-128238aKjqlp123AKdasdf://

At this time, I can't explain the discrepancy. Why it works for most, but not others. Below are some of the other callbacks I used in the past. Again, it's to simply return to your running mobile app. There's something we're missing here.

twittersdk://
http://localhost:8080/
https://xxxxx-xxxx-xxxxxx.firebaseapp.com/__/auth/handler
https://127.0.0.1/

[MaskyS]

https://github.com/roughike/flutter_twitter_login/issues Lots of PRs and issues filed since the last commit of this project, which was back in 2018.

The package being used on pub.dev is this fork: https://github.com/Maliffic/flutter_twitter_login, but the latter also hasn't been maintained since mid-2019.

I suspect that there are quite a few things to get straightened out before this plugin can be realistically used in production. Most notably, roughike/flutter_twitter_login#34, without which Apple will reject your app submission.

@Andrious, would you consider asking @roughike permission for maintaining the OG repo?

[Andrious]

@MaskyS, I will consider it. Ideally, I would like the original author to allow for pull requests. I will reach out to roughike (by an alternate means) and to others frankly and see if other managements can not be made.

[Andrious]

@alexda12, @MaskyS @bpaul7101 @ssbaval

Yeah, I'm hitting a wall on this one. I went so far as go to the cache copy for the package, flutter_twitter, and changed the 'compileSdkVersion' value from 27 to 28. It seemed to have worked, but I will ask you all to try the same. I know it's a lot, but if it works, then we have something to work with and possibly fork the repo. and supply a fix.

Go into your IDE and open up your project in question. You then open up 'Dart Packages' under 'External Libraries' and find flutter_twitter. Open up the file, flutter_twitter.dart, and then right-click on its path specified along the top. Right-click on the flutter_twitter folder to display its contents. You then click on the displayed folder, android.

In that drop-down menu, click on the file build.gradle and open it up.

Change it the 'compileSdkVersion' value from 27 to 28. Close things up and try it. It's hoped this will help you. It's not a solution; it's a test. If it works, we'll fork it, and possibly some other changes to remove any deprecated API's.

[alexda12]

Hi @Andrious , thanks for your latest post - but your comment is Android specific . If you recall from my original post #20 (comment), the issue I am having is with iOS and not Android.

[Andrious]

@alexda12, @MaskyS @bpaul7101 @ssbaval Oh boy. Forget that last post. Working on too many things here...

Today, I'll see where we stand on this.

[Andrious]

@alexda12, @MaskyS @bpaul7101 @ssbaval

Ok, let's see if we can't get a solution to this.
I mean, I'm having no problem with the Twitter login. The callback works for me, but why is it not for you?

Again, these are the callback url's I'm using. However, I want to get to the bottom of this
and so I'll give you access to a repository of a working example, authenticate_app, in the hope you will see something to help you.

twittersdk://
http://localhost:8080/
https://xxxxx-xxxx-xxxxxx.firebaseapp.com/__/auth/handler
https://127.0.0.1/

I would suggest forking the repo. and see if you can get that to work. If you can, we're a little closer.
If you can't, maybe we can track down why. I'm giving you as much information as I can think of to solve this.
You see, I'm not in the position to support another plugin. Besides, it's working for me...for now.

First, here is the flutter doctor -v settings I had at the time it worked. Note, the Flutter channel is 'master.'

[✓] Flutter (Channel master, 1.20.0-3.0.pre.124, on Mac OS X 10.15.5 19F101, locale en-CA)
    • Flutter version 1.20.0-3.0.pre.124 at /Users/gregperry/Projects/flutter
    • Framework revision ec3368ae45 (13 hours ago), 2020-07-02 01:58:01 -0400
    • Engine revision 65ac8be350
    • Dart version 2.9.0 (build 2.9.0-20.0.dev f8ff12008e)

[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
    • Android SDK at /Users/gregperry/Library/Android/sdk
    • Platform android-28, build-tools 28.0.3
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 11.5)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 11.5, Build version 11E608c
    • CocoaPods version 1.9.3

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 4.0)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin version 47.1.2
    • Dart plugin version 193.7361
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)

[✓] IntelliJ IDEA Community Edition (version 2019.1)
    • IntelliJ at /Applications/IntelliJ IDEA CE.app
    • Flutter plugin version 34.0.4
    • Dart plugin version 191.6183.88

[✓] Connected device (3 available)
    • Greg’s iPhone (mobile) • 790231423ae297eb332cfbb9d02ec90f023e1588 • ios            • iOS 13.5.1
    • Web Server (web)       • web-server                               • web-javascript • Flutter Tools
    • Chrome (web)           • chrome                                   • web-javascript • Google Chrome 83.0.4103.116

• No issues found!

Note, retrieving this repository, you'll get all the 'iOS' files used, you'll be aware now of their version numbers. What I mean is, you'll get a lot of the ios/ folder content as well in the hope you'll succeed in running the example app and its Twitter login. I've even provided a 'Twitter app' in the file, GoogleServices-info.plist, to see if you can use Twitter login with that app.

I'm supplying the 'podfile' that got the app working. Possibly you'll see something in there that makes the difference.

# Uncomment this line to define a global platform for your project
platform :ios, '10'

# CocoaPods analytics sends network stats synchronously affecting flutter build latency.
ENV['COCOAPODS_DISABLE_STATS'] = 'true'

project 'Runner', {
  'Debug' => :debug,
  'Profile' => :release,
  'Release' => :release,
}

def flutter_root
  generated_xcode_build_settings_path = File.expand_path(File.join('..', 'Flutter', 'Generated.xcconfig'), __FILE__)
  unless File.exist?(generated_xcode_build_settings_path)
    raise "#{generated_xcode_build_settings_path} must exist. If you're running pod install manually, make sure flutter pub get is executed first"
  end

  File.foreach(generated_xcode_build_settings_path) do |line|
    matches = line.match(/FLUTTER_ROOT\=(.*)/)
    return matches[1].strip if matches
  end
  raise "FLUTTER_ROOT not found in #{generated_xcode_build_settings_path}. Try deleting Generated.xcconfig, then run flutter pub get"
end

require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelper'), flutter_root)

flutter_ios_podfile_setup

target 'Runner' do
  flutter_install_all_ios_pods File.dirname(File.realpath(__FILE__))
  use_frameworks!
end

post_install do |installer|
  installer.pods_project.targets.each do |target|
    flutter_additional_ios_build_settings(target)
    target.build_configurations.each do |config|
       config.build_settings['ENABLE_BITCODE'] = 'NO'
       config.build_settings['SWIFT_VERSION'] = '4.2' #this line
    end
  end
end

In Podfile.lock, compare it to the file in your app and see if the version numbers of the similar files used in your app do not match:

PODS:
  - AppAuth (1.4.0):
    - AppAuth/Core (= 1.4.0)
    - AppAuth/ExternalUserAgent (= 1.4.0)
  - AppAuth/Core (1.4.0)
  - AppAuth/ExternalUserAgent (1.4.0)
  - FBSDKCoreKit (7.0.1):
    - FBSDKCoreKit/Basics (= 7.0.1)
    - FBSDKCoreKit/Core (= 7.0.1)
  - FBSDKCoreKit/Basics (7.0.1)
  - FBSDKCoreKit/Core (7.0.1):
    - FBSDKCoreKit/Basics
  - FBSDKLoginKit (7.0.1):
    - FBSDKLoginKit/Login (= 7.0.1)
  - FBSDKLoginKit/Login (7.0.1):
    - FBSDKCoreKit (~> 7.0.1)
  - Firebase/Auth (6.26.0):
    - Firebase/CoreOnly
    - FirebaseAuth (~> 6.5.3)
  - Firebase/Core (6.26.0):
    - Firebase/CoreOnly
    - FirebaseAnalytics (= 6.6.0)
  - Firebase/CoreOnly (6.26.0):
    - FirebaseCore (= 6.7.2)
  - firebase_auth (0.0.1):
    - Firebase/Auth (~> 6.3)
    - Firebase/Core
    - Flutter
  - firebase_core (0.0.1):
    - Firebase/Core
    - Flutter
  - FirebaseAnalytics (6.6.0):
    - FirebaseCore (~> 6.7)
    - FirebaseInstallations (~> 1.3)
    - GoogleAppMeasurement (= 6.6.0)
    - GoogleUtilities/AppDelegateSwizzler (~> 6.0)
    - GoogleUtilities/MethodSwizzler (~> 6.0)
    - GoogleUtilities/Network (~> 6.0)
    - "GoogleUtilities/NSData+zlib (~> 6.0)"
    - nanopb (~> 1.30905.0)
  - FirebaseAuth (6.5.3):
    - FirebaseAuthInterop (~> 1.0)
    - FirebaseCore (~> 6.6)
    - GoogleUtilities/AppDelegateSwizzler (~> 6.5)
    - GoogleUtilities/Environment (~> 6.5)
    - GTMSessionFetcher/Core (~> 1.1)
  - FirebaseAuthInterop (1.1.0)
  - FirebaseCore (6.7.2):
    - FirebaseCoreDiagnostics (~> 1.3)
    - FirebaseCoreDiagnosticsInterop (~> 1.2)
    - GoogleUtilities/Environment (~> 6.5)
    - GoogleUtilities/Logger (~> 6.5)
  - FirebaseCoreDiagnostics (1.3.0):
    - FirebaseCoreDiagnosticsInterop (~> 1.2)
    - GoogleDataTransportCCTSupport (~> 3.1)
    - GoogleUtilities/Environment (~> 6.5)
    - GoogleUtilities/Logger (~> 6.5)
    - nanopb (~> 1.30905.0)
  - FirebaseCoreDiagnosticsInterop (1.2.0)
  - FirebaseInstallations (1.3.0):
    - FirebaseCore (~> 6.6)
    - GoogleUtilities/Environment (~> 6.6)
    - GoogleUtilities/UserDefaults (~> 6.6)
    - PromisesObjC (~> 1.2)
  - Flutter (1.0.0)
  - flutter_login_facebook (0.1.0):
    - FBSDKLoginKit (~> 7.0)
    - Flutter
  - flutter_twitter (0.0.1):
    - Flutter
    - TwitterCore
    - TwitterKit
  - google_sign_in (0.0.1):
    - Flutter
    - GoogleSignIn (~> 5.0)
  - GoogleAppMeasurement (6.6.0):
    - GoogleUtilities/AppDelegateSwizzler (~> 6.0)
    - GoogleUtilities/MethodSwizzler (~> 6.0)
    - GoogleUtilities/Network (~> 6.0)
    - "GoogleUtilities/NSData+zlib (~> 6.0)"
    - nanopb (~> 1.30905.0)
  - GoogleDataTransport (6.2.1)
  - GoogleDataTransportCCTSupport (3.1.0):
    - GoogleDataTransport (~> 6.1)
    - nanopb (~> 1.30905.0)
  - GoogleSignIn (5.0.2):
    - AppAuth (~> 1.2)
    - GTMAppAuth (~> 1.0)
    - GTMSessionFetcher/Core (~> 1.1)
  - GoogleUtilities/AppDelegateSwizzler (6.6.0):
    - GoogleUtilities/Environment
    - GoogleUtilities/Logger
    - GoogleUtilities/Network
  - GoogleUtilities/Environment (6.6.0):
    - PromisesObjC (~> 1.2)
  - GoogleUtilities/Logger (6.6.0):
    - GoogleUtilities/Environment
  - GoogleUtilities/MethodSwizzler (6.6.0):
    - GoogleUtilities/Logger
  - GoogleUtilities/Network (6.6.0):
    - GoogleUtilities/Logger
    - "GoogleUtilities/NSData+zlib"
    - GoogleUtilities/Reachability
  - "GoogleUtilities/NSData+zlib (6.6.0)"
  - GoogleUtilities/Reachability (6.6.0):
    - GoogleUtilities/Logger
  - GoogleUtilities/UserDefaults (6.6.0):
    - GoogleUtilities/Logger
  - GTMAppAuth (1.0.0):
    - AppAuth/Core (~> 1.0)
    - GTMSessionFetcher (~> 1.1)
  - GTMSessionFetcher (1.4.0):
    - GTMSessionFetcher/Full (= 1.4.0)
  - GTMSessionFetcher/Core (1.4.0)
  - GTMSessionFetcher/Full (1.4.0):
    - GTMSessionFetcher/Core (= 1.4.0)
  - nanopb (1.30905.0):
    - nanopb/decode (= 1.30905.0)
    - nanopb/encode (= 1.30905.0)
  - nanopb/decode (1.30905.0)
  - nanopb/encode (1.30905.0)
  - PromisesObjC (1.2.9)
  - TwitterCore (3.2.0)
  - TwitterKit (3.4.2):
    - TwitterCore (>= 3.2.0)

DEPENDENCIES:
  - firebase_auth (from `.symlinks/plugins/firebase_auth/ios`)
  - firebase_core (from `.symlinks/plugins/firebase_core/ios`)
  - Flutter (from `Flutter`)
  - flutter_login_facebook (from `.symlinks/plugins/flutter_login_facebook/ios`)
  - flutter_twitter (from `.symlinks/plugins/flutter_twitter/ios`)
  - google_sign_in (from `.symlinks/plugins/google_sign_in/ios`)

SPEC REPOS:
  trunk:
    - AppAuth
    - FBSDKCoreKit
    - FBSDKLoginKit
    - Firebase
    - FirebaseAnalytics
    - FirebaseAuth
    - FirebaseAuthInterop
    - FirebaseCore
    - FirebaseCoreDiagnostics
    - FirebaseCoreDiagnosticsInterop
    - FirebaseInstallations
    - GoogleAppMeasurement
    - GoogleDataTransport
    - GoogleDataTransportCCTSupport
    - GoogleSignIn
    - GoogleUtilities
    - GTMAppAuth
    - GTMSessionFetcher
    - nanopb
    - PromisesObjC
    - TwitterCore
    - TwitterKit

EXTERNAL SOURCES:
  firebase_auth:
    :path: ".symlinks/plugins/firebase_auth/ios"
  firebase_core:
    :path: ".symlinks/plugins/firebase_core/ios"
  Flutter:
    :path: Flutter
  flutter_login_facebook:
    :path: ".symlinks/plugins/flutter_login_facebook/ios"
  flutter_twitter:
    :path: ".symlinks/plugins/flutter_twitter/ios"
  google_sign_in:
    :path: ".symlinks/plugins/google_sign_in/ios"

SPEC CHECKSUMS:
  AppAuth: 31bcec809a638d7bd2f86ea8a52bd45f6e81e7c7
  FBSDKCoreKit: 9cc05bec0568a5955c82eb59ae95da0fe125b88d
  FBSDKLoginKit: ecc6fd43c81b60f5b5e9388d58f137aff4a5d00b
  Firebase: 7cf5f9c67f03cb3b606d1d6535286e1080e57eb6
  firebase_auth: cd5627e6773255d15b73d763fd0878734289a509
  firebase_core: a8a3fe72627891cb05558a6ba230b2061e75e18e
  FirebaseAnalytics: 96634d356482d4f3af8fe459a0ebf19a99c71b75
  FirebaseAuth: 7047aec89c0b17ecd924a550c853f0c27ac6015e
  FirebaseAuthInterop: a0f37ae05833af156e72028f648d313f7e7592e9
  FirebaseCore: f42e5e5f382cdcf6b617ed737bf6c871a6947b17
  FirebaseCoreDiagnostics: 4a773a47bd83bbd5a9b1ccf1ce7caa8b2d535e67
  FirebaseCoreDiagnosticsInterop: 296e2c5f5314500a850ad0b83e9e7c10b011a850
  FirebaseInstallations: 6f5f680e65dc374397a483c32d1799ba822a395b
  Flutter: 0e3d915762c693b495b44d77113d4970485de6ec
  flutter_login_facebook: 7f2123e68cbe29ec9483b7a1111a9f6016ab24ab
  flutter_twitter: f33a30ee64ecf27e189e2f3cb53ce3318b8bb396
  google_sign_in: decaf71f56e22fb1dc179de062177ae6df415716
  GoogleAppMeasurement: 67458367830514fb20fd9e233496f1eef9d90185
  GoogleDataTransport: 9a8a16f79feffc7f42096743de2a7c4815e84020
  GoogleDataTransportCCTSupport: d70a561f7d236af529fee598835caad5e25f6d3d
  GoogleSignIn: 7137d297ddc022a7e0aa4619c86d72c909fa7213
  GoogleUtilities: 39530bc0ad980530298e9c4af8549e991fd033b1
  GTMAppAuth: 4deac854479704f348309e7b66189e604cf5e01e
  GTMSessionFetcher: 6f5c8abbab8a9bce4bb3f057e317728ec6182b10
  nanopb: c43f40fadfe79e8b8db116583945847910cbabc9
  PromisesObjC: b48e0338dbbac2207e611750777895f7a5811b75
  TwitterCore: 8cbc9ad34d91c63a0035ea05bfbfc0d7ca72a28c
  TwitterKit: 5e4f41d70b9abdb41df5467f52d7aa2c0fd26ebb

PODFILE CHECKSUM: 6e7caf167c8f502535faeca1a606235812ad0aa5

COCOAPODS: 1.9.3

I've even given the list of Flutter packages used and their version numbers in the pubspec.lock file. Anything to help you out. I mean, it's pretty much the same listing above, but who knows, maybe there's something we missed.

# Generated by pub
# See https://dart.dev/tools/pub/glossary#lockfile
packages:
  async:
    dependency: transitive
    description:
      name: async
      url: "https://pub.dartlang.org"
    source: hosted
    version: "2.4.1"
  auth:
    dependency: "direct main"
    description:
      name: auth
      url: "https://pub.dartlang.org"
    source: hosted
    version: "6.0.3"
  boolean_selector:
    dependency: transitive
    description:
      name: boolean_selector
      url: "https://pub.dartlang.org"
    source: hosted
    version: "2.0.0"
  characters:
    dependency: transitive
    description:
      name: characters
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.0.0"
  charcode:
    dependency: transitive
    description:
      name: charcode
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.1.3"
  clock:
    dependency: transitive
    description:
      name: clock
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.0.1"
  collection:
    dependency: transitive
    description:
      name: collection
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.14.13"
  cupertino_icons:
    dependency: "direct main"
    description:
      name: cupertino_icons
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.1.3"
  fake_async:
    dependency: transitive
    description:
      name: fake_async
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.1.0"
  firebase_auth:
    dependency: transitive
    description:
      name: firebase_auth
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.15.1+1"
  firebase_auth_platform_interface:
    dependency: transitive
    description:
      name: firebase_auth_platform_interface
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.1.8"
  firebase_core:
    dependency: transitive
    description:
      name: firebase_core
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.4.2+2"
  firebase_core_platform_interface:
    dependency: transitive
    description:
      name: firebase_core_platform_interface
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.0.4"
  flutter:
    dependency: "direct main"
    description: flutter
    source: sdk
    version: "0.0.0"
  flutter_login_facebook:
    dependency: transitive
    description:
      name: flutter_login_facebook
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.1.2+3"
  flutter_test:
    dependency: "direct dev"
    description: flutter
    source: sdk
    version: "0.0.0"
  flutter_twitter:
    dependency: transitive
    description:
      name: flutter_twitter
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.1.3"
  google_sign_in:
    dependency: transitive
    description:
      name: google_sign_in
      url: "https://pub.dartlang.org"
    source: hosted
    version: "4.0.16"
  google_sign_in_platform_interface:
    dependency: transitive
    description:
      name: google_sign_in_platform_interface
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.1.2"
  http:
    dependency: "direct main"
    description:
      name: http
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.12.1"
  http_parser:
    dependency: transitive
    description:
      name: http_parser
      url: "https://pub.dartlang.org"
    source: hosted
    version: "3.1.4"
  list_ext:
    dependency: transitive
    description:
      name: list_ext
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.1.9+1"
  matcher:
    dependency: transitive
    description:
      name: matcher
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.12.8"
  meta:
    dependency: transitive
    description:
      name: meta
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.1.8"
  path:
    dependency: transitive
    description:
      name: path
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.7.0"
  pedantic:
    dependency: transitive
    description:
      name: pedantic
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.8.0+1"
  plugin_platform_interface:
    dependency: transitive
    description:
      name: plugin_platform_interface
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.0.2"
  quiver:
    dependency: transitive
    description:
      name: quiver
      url: "https://pub.dartlang.org"
    source: hosted
    version: "2.1.3"
  sky_engine:
    dependency: transitive
    description: flutter
    source: sdk
    version: "0.0.99"
  source_span:
    dependency: transitive
    description:
      name: source_span
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.7.0"
  stack_trace:
    dependency: transitive
    description:
      name: stack_trace
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.9.3"
  stream_channel:
    dependency: transitive
    description:
      name: stream_channel
      url: "https://pub.dartlang.org"
    source: hosted
    version: "2.0.0"
  string_scanner:
    dependency: transitive
    description:
      name: string_scanner
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.0.5"
  term_glyph:
    dependency: transitive
    description:
      name: term_glyph
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.1.0"
  test_api:
    dependency: transitive
    description:
      name: test_api
      url: "https://pub.dartlang.org"
    source: hosted
    version: "0.2.17"
  typed_data:
    dependency: transitive
    description:
      name: typed_data
      url: "https://pub.dartlang.org"
    source: hosted
    version: "1.2.0"
  vector_math:
    dependency: transitive
    description:
      name: vector_math
      url: "https://pub.dartlang.org"
    source: hosted
    version: "2.0.8"
sdks:
  dart: ">=2.9.0-14.0.dev <3.0.0"
  flutter: ">=1.10.0 <2.0.0"

Lastly, I'll supply the pubspec.yaml for the package, Auth. There you will see I indeed replaced the 'troublesome' lutter_facebook_login: ^3.0.0 Anything to bring up any ideas as to the issue. Cheers.

name: auth
description: Authorization Library Package to log into Google, Facebook, or by Username and Password.

version: 6.0.3

homepage: https://github.com/AndriousSolutions/auth
repository: https://github.com/AndriousSolutions/auth

environment:
  sdk: '>=2.6.0 <3.0.0'

dependencies:
  flutter:
    sdk: flutter

  # https://pub.dev/packages/cloud_firestore
#  cloud_firestore: ^0.13.0

  # https://pub.dartlang.org/packages/firebase_auth
  firebase_auth: ^0.16.0

  # https://pub.dartlang.org/packages/google_sign_in
  google_sign_in: ^4.0.0

  # https://pub.dev/packages/google_sign_in_platform_interface
  google_sign_in_platform_interface: ^1.0.0

  # https://pub.dev/packages/flutter_login_facebook
  flutter_login_facebook: ^0.1.1
  
  # https://pub.dev/packages/flutter_facebook_login
#  flutter_facebook_login: ^3.0.0

  # https://pub.dev/packages/flutter_twitter
  flutter_twitter: ^1.0.0

[Andrious]

I've completed some further testing, today.
Again, I started with the Flutter channel, master, and worked through all the channels: master, dev, beta, stable

It's recommended, of course, to work with the channel, stable, when releasing apps into production, but I found only the first two channels, master & dev, worked. Of course, master is 'bleeding edge' code prone to accidental crashes. I'll work on to determine exactly why--what's the exact issue. For now, I wanted you to know these latest findings.

Flutter build channel releases

It was a long and arduous exercise too. Every time I switched to another channel I would then issue a flutter clean before continuing with a flutter run

For example:
flutter channel dev
flutter clean
flutter run