refreshToken method

@override Future<Either<Failure, Token>> refreshToken()

Tries to silently login. will try to use the existing refresh token to get a new token.

Implementation

@override
Future<Either<Failure, Token>> refreshToken() async {
  var token = await _authStorage.loadTokenFromCache();

  if (!token.hasValidAccessToken()) {
    token.accessToken = null;
  }

  if (token.hasRefreshToken()) {
    final result =
        await _requestToken.requestRefreshToken(token.refreshToken!);
    //If refresh token request throws an exception, we have to do
    //a fullAuthFlow.
    result.fold(
      (l) => token.accessToken = null,
      (r) => token = r,
    );
  }

  await _authStorage.saveTokenToCache(token);
  return Right(token);
}