login method
throws an exception if the TokenResponse from AuthenticatorProvider is null.
Initiates the login process using the authenticator provider. Stores the accessToken and user name locally using storage provider
Implementation
Future<void> login() async {
await _authenticatorProvider.authorize();
final TokenResponse? tokenResponse =
await _authenticatorProvider.getTokenResponse();
if (tokenResponse == null) {
throw 'TokenResponse from AuthenticatorProvider is null. Check if the Credentials is created or not';
}
await _storageProvider.setTokenResponse(_toEncodedString(tokenResponse));
final String? userName = _authenticatorProvider.getUserName();
await _storageProvider.setUserName(userName);
_authenticatorProvider.close();
}