Добавлена логика HasJoined для сервера авторизации Minecraft

Исправлена ошибка в JoinForm
Добавлено базовое API для общения с сервером системы скинов

api/modules/session/models/HasJoinedForm.php

@@ -0,0 +1,52 @@
+<?php
+namespace api\modules\session\models;
+
+use api\modules\session\exceptions\ForbiddenOperationException;
+use api\modules\session\exceptions\IllegalArgumentException;
+use api\modules\session\models\protocols\HasJoinedInterface;
+use api\modules\session\Module as Session;
+use common\models\Account;
+use yii\base\ErrorException;
+use yii\base\Model;
+
+class HasJoinedForm extends Model {
+
+    private $protocol;
+
+    public function __construct(HasJoinedInterface $protocol, array $config = []) {
+        $this->protocol = $protocol;
+        parent::__construct($config);
+    }
+
+    public function hasJoined() : Account {
+        if (!$this->protocol->validate()) {
+            throw new IllegalArgumentException();
+        }
+
+        $serverId = $this->protocol->getServerId();
+        $username = $this->protocol->getUsername();
+
+        Session::info(
+            "Server with server_id = '{$serverId}' trying to verify has joined user with username = '{$username}'."
+        );
+
+        $joinModel = SessionModel::find($username, $serverId);
+        if ($joinModel === null) {
+            Session::error("Not found join operation for username = '{$username}'.");
+            throw new ForbiddenOperationException('Invalid token.');
+        }
+
+        $joinModel->delete();
+        $account = $joinModel->getAccount();
+        if ($account === null) {
+            throw new ErrorException('Account must exists');
+        }
+
+        Session::info(
+            "User with username = '{$username}' successfully verified by server with server_id = '{$serverId}'."
+        );
+
+        return $account;
+    }
+
+}