- (void) getPasswordAuthenticationDetails: (AWSCognitoIdentityPasswordAuthenticationInput *) authenticationInput  passwordAuthenticationCompletionSource: (AWSTaskCompletionSource<AWSCognitoIdentityPasswordAuthenticationDetails *> *) passwordAuthenticationCompletionSource
{
    /* self.passwordAuthenticationCompletion = passwordAuthenticationCompletionSource;

    dispatch_async(dispatch_get_main_queue(), ^{

        if(!self.username)
        {
            _usernameStr = authenticationInput.lastKnownUsername;
        }
    }); */

    self.passwordAuthenticationCompletion.result = [[AWSCognitoIdentityPasswordAuthenticationDetails alloc] initWithUsername:@"bqf" password:@"000000"];
}