amnah\yii2\user\controllers\AuthController::attemptLogin PHP Method

    protected function attemptLogin($client)
    {
        /** @var \amnah\yii2\user\models\User $user */
        /** @var \amnah\yii2\user\models\UserAuth $userAuth */
        /** @var \amnah\yii2\user\models\UserToken $userToken */
        $user = $this->module->model("User");
        $userAuth = $this->module->model("UserAuth");
        $userToken = $this->module->model("UserToken");
        // attempt to find userAuth in database by id and name
        $attributes = $client->getUserAttributes();
        $userAuth = $userAuth::findOne(["provider" => $client->name, "provider_id" => (string) $attributes["id"]]);
        if ($userAuth) {
            // check if user is banned, otherwise log in
            $user = $user::findOne($userAuth->user_id);
            if ($user && $user->banned_at) {
                return false;
            }
            Yii::$app->user->login($user, $this->module->loginDuration);
            return true;
        }
        // call "setInfo{clientName}" function to ensure that we get email consistently
        // this is mainly used for google auth, which returns the email in an array
        // @see setInfoGoogle()
        $function = "setInfo" . ucfirst($client->name);
        list($user, $profile) = $this->{$function}($attributes);
        // attempt to find user by email
        if (!empty($user["email"])) {
            // check if any user has has tried to change their email
            // if so, delete it
            $email = trim($user["email"]);
            $userToken = $userToken::findByData($email, $userToken::TYPE_EMAIL_CHANGE);
            if ($userToken) {
                $userToken->delete();
            }
            // find user and create user provider for match
            $user = $user::findOne(["email" => $email]);
            if ($user) {
                $userAuth = $this->initUserAuth($client);
                $userAuth->setUser($user->id)->save();
                Yii::$app->user->login($user, $this->module->loginDuration);
                return true;
            }
        }
        return false;
    }