socketlabs package won't download with composer

[mdw15]

I get an error trying to load SocketLabs from wpackagist:

composer require "wpackagist-plugin/socketlabs":"^1.0"
./composer.json has been created
Running composer update wpackagist-plugin/socketlabs
Loading composer repositories with package information
Updating dependencies
Your requirements could not be resolved to an installable set of packages.

Problem 1
- Root composer.json requires wpackagist-plugin/socketlabs, it could not be found in any version, there may be a typo in the package name.

Potential causes:

• A typo in the package name
• The package is not available in a stable-enough version according to your minimum-stability setting
  see https://getcomposer.org/doc/04-schema.md#minimum-stability for more details.
• It's a private package and you forgot to add a custom repository to find it

Read https://getcomposer.org/doc/articles/troubleshooting.md for further common problems.

Installation failed, deleting ./composer.json.