How to get access code again after O365 account is connected

[ritushukla]

Hi Team,
How we can get access token again If access token is expired or want to get new token (refresh token) without customer re-authentication in Msal. Previously we were using adal and below is the code.

AuthenticationContext context = new AuthenticationContext(config.getAzureOAuthAuthority(), true, service);
context.setProxy(ProxiedJdkHttpUrlConnectionSource.INSTANCE.getProxy());
Future future = context.acquireTokenByRefreshToken(refreshToken, credential, null);

I am trying below code but it is not working.

final ConfidentialClientApplication app =
ConfidentialClientApplication.builder(
config.getAzureOAuthClientId(), ClientCredentialFactory.createFromSecret(config.getAzureOAuthClientSecret()))
.authority(config.getAzureOAuthAuthority())
.build();
SilentParameters parameters = SilentParameters.builder(
Collections.singleton("https://graph.microsoft.com/.default"),
app.getAccounts().join().iterator().next()).build();
CompletableFuture future = app.acquireTokenSilently(parameters);
result = future.get();