/**
* Redirect the user of the application to the WeChat's authentication screen.
*
* @param string $to
* @param string $scope
*
* @return RedirectResponse
*
* @throws InvalidArgumentException
*/
public function redirect($to, $scope = 'snsapi_userinfo')
{
if (!in_array($scope, $this->scopes)) {
throw new InvalidArgumentException("Invalid oauth scope:'{$scope}'");
}
$this->request->getSession()->set('state', $state = Str::random(40));
return new RedirectResponse($this->buildAuthUrlFromBase($to, $scope, $state) . '#wechat_redirect');
}
