我有一个Yii 2应用程序，我正在从第三方API验证用户，一旦用户通过验证，我就登录用户并设置身份，一切都很好。但当我导航到任何其他页面时，用户身份变为空，用户变成了访客用户。
下面是我的登录表单：

<?php

namespace app\models;

use app\components\RestBehavior;
use app\models\web\LoginIdentity;
use Yii;
use yii\base\Model;
use yii\helpers\Json;
use yii\helpers\VarDumper;
use yii\web\IdentityInterface;

/**
 * LoginForm is the model behind the login form.
 *
 * @property User|null $user This property is read-only.
 *
 */
class LoginForm extends Model
{
    public $email;
    public $password;
    public $company_id;
    public $companies=[];
    public $token;

    private $_user = false;

    public function behaviors()
    {
        return [
            RestBehavior::class
        ];
    }

    /**
     * @return array the validation rules.
     */
    public function rules()
    {
        return [
            [['email', 'password','company_id'], 'required'],
        ];
    }

    /**
     * Logs in a user using the provided username and password.
     * @return bool whether the user is logged in successfully
     */
    public function login()
    {
        return Yii::$app->user->login($this->getUser(), 0);
    }

    /**
     * Finds user by [[username]]
     *
     * @return User|null
     */
    public function getUser()
    {
        if ($this->_user === false) {
            $this->_user = LoginIdentity::findUser($this->attributes);
        }
        return $this->_user;
    }

}

下面是我的自定义LoginIdentity类：

<?php

namespace app\models\web;

use app\components\RestBehavior;
use \Yii;
use yii\helpers\Json;
use yii\helpers\Url;
use yii\helpers\VarDumper;

class LoginIdentity extends \yii\base\BaseObject implements \yii\web\IdentityInterface
{
    public $resource_id;
    public $token;

    /**
     * {@inheritdoc}
     */
    public function behaviors()
    {
        return [
            RestBehavior::class
        ];
    }

    public static function findUser($params)
    {
        if(!empty(Yii::$app->user->identity))
        {
            return new static([
                'resource_id'=>self::getId(),
                'token'=>self::getAuthKey()
            ]);
        }
        else
        {
            Yii::$app->controller->sendPOST('/login',$params);
            if(Yii::$app->response->statusCode===200)
            {
                $response=Json::decode(Yii::$app->response->data);
                $identity=new static([
                    'resource_id'=>$response['resource']['resource_id'],
                    'token'=>$response['token']
                ]);
                Yii::$app->session->set('resource_id',$response['resource']['resource_id']);
                Yii::$app->session->set('token',$response['token']);
                return $identity;
            }
            return null;
        }

    }

    /**
     * {@inheritdoc}
     */
    public static function findIdentity($id)
    {
        $session=Yii::$app->session;
        if(!empty($session['resource_id'])&&!empty($session['token']))
        {
            return new static([
                'resource_id'=>$session['resource_id'],
                'token'=>$session['token']
            ]);
        }
        return null;
    }

    /**
     * {@inheritdoc}
     * @param \Lcobucci\JWT\Token $token
     */
    public static function findIdentityByAccessToken($token, $type = null)
    {
    }

    /**
     * Finds user by username
     *
     * @param string $username
     * @return static|null
     */
    public static function findByUsername($username)
    {

    }

    /**
     * {@inheritdoc}
     */
    public function getId()
    {
        return $this->resource_id;
    }

    /**
     * {@inheritdoc}
     */
    public function getAuthKey()
    {
        return $this->token;
    }

    /**
     * {@inheritdoc}
     */
    public function validateAuthKey($authKey)
    {
    }

    /**
     * Validates password
     *
     * @param string $password password to validate
     * @return bool if password provided is valid for current user
     */
    public function validatePassword($password)
    {
    }
}

很奇怪的是，整个代码在我的本地计算机上运行得很好，也就是说在localhost上。但是在服务器上，用户get登录了，但是当他访问任何新的经过验证的路由时就注销了。我已经检查了服务器的/var/lib/php/sessions文件夹，会话被正确地保存了，所以没有权限问题。有人能告诉我这里出了什么问题吗？为什么它在我的本地计算机上运行，而不是远程运行。谢谢。