public function authenticate(TokenInterface $token)
 {
     if (strlen($token->getOAuthToken()) === 0) {
         $url = $this->remoteApiUrl . "/oauth/v2/token?" . "client_id=" . $this->remoteApiId . "&client_secret=" . $this->remoteApiSecret . "&grant_type=password" . "&username="******"&password=" . $token->getPassword();
         $ch = curl_init();
         curl_setopt($ch, CURLOPT_URL, $url);
         curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
         $apiResponse = json_decode(curl_exec($ch));
         curl_close($ch);
         if (isset($apiResponse->access_token)) {
             $user = $this->userManager->createUser();
             $user->setUsername($token->getUsername());
             $authenticatedToken = new OAuthUserToken($user->getRoles());
             $authenticatedToken->setUser($user);
             $authenticatedToken->setOAuthToken($apiResponse->access_token);
             $authenticatedToken->setRefreshToken($apiResponse->refresh_token);
             $authenticatedToken->setTokenType($apiResponse->token_type);
             // We take 3 minutes less (180 seconds) just to be sure.
             $authenticatedToken->setExpireTime(time() + $apiResponse->expires_in - 180);
             return $authenticatedToken;
         } elseif (isset($apiResponse->error_description)) {
             throw new AuthenticationException($apiResponse->error_description);
         } else {
             throw new AuthenticationException('The OAuth authentication failed.');
         }
     } else {
         return $token;
     }
 }