$acsPost = $this->followingRedirects()->post('/saml2/acs', ['SAMLResponse' => $this->acsPostData]);
$user = User::query()->where('external_auth_id', '=', 'user')->first();
$acsPost = $this->followingRedirects()->post('/saml2/acs', ['SAMLResponse' => $this->acsPostData]);
$user = User::query()->where('external_auth_id', '=', 'user')->first();