Flutter: Authentication with Azure AD B2C returns result but with empty accesstoken

Question

I try to build a Flutter app with Azure B2C authentication. To achive this I use the Flutter App Auth Plugin. At first sight everything seems to work as expected, but when I looked at the result the accesstoken is null. What am I missing? Obviously, I can get a connection to Azure and after entering the credentials a result is send back to my app. But why without token?

Debug session of the result: Debug session of the result

My configuration: configuration

I call the method like this:

  Future<void> _login() async{
AuthorizationTokenResponse result;
try{
  result = await _appauth.authorizeAndExchangeCode(
    AuthorizationTokenRequest(_clientId, _redirectUrl,
        discoveryUrl: _discoveryUrl,
        scopes: _scopes),
  );
}
catch(e){
  print(e.toString());
}
if (result != null) {
  _processAuthTokenResponse(result);
}

}

Does anybody know what I forgot? Thanks!

Jas Suri - MSFT Jas Suri - MSFT · Accepted Answer · 2020-01-21T00:41:33

You aren’t giving a scope to a resource so you don’t get an access token.

https://docs.microsoft.com/en-us/azure/active-directory-b2c/active-directory-b2c-access-tokens

Flutter: Authentication with Azure AD B2C returns result but with empty accesstoken

1 Answers