Добавлена логика HasJoined для сервера авторизации Minecraft

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

tests/codeception/api/functional/sessionserver/HasJoinedLegacyCest.php

@@ -0,0 +1,51 @@
+<?php
+namespace tests\codeception\api\functional\sessionserver;
+
+use Faker\Provider\Uuid;
+use tests\codeception\api\_pages\SessionServerRoute;
+use tests\codeception\api\functional\_steps\SessionServerSteps;
+use tests\codeception\api\FunctionalTester;
+
+class HasJoinedLegacyCest {
+
+    /**
+     * @var SessionServerRoute
+     */
+    private $route;
+
+    public function _before(FunctionalTester $I) {
+        $this->route = new SessionServerRoute($I);
+    }
+
+    public function hasJoined(SessionServerSteps $I) {
+        $I->wantTo('test hasJoined user to some server by legacy version');
+        list($username, $serverId) = $I->amJoined(true);
+
+        $this->route->hasJoinedLegacy([
+            'user' => $username,
+            'serverId' => $serverId,
+        ]);
+        $I->seeResponseCodeIs(200);
+        $I->canSeeResponseEquals('YES');
+    }
+
+    public function wrongArguments(FunctionalTester $I) {
+        $I->wantTo('get error on wrong amount of arguments');
+        $this->route->hasJoinedLegacy([
+            'wrong' => 'argument',
+        ]);
+        $I->canSeeResponseCodeIs(400);
+        $I->canSeeResponseEquals('credentials can not be null.');
+    }
+
+    public function hasJoinedWithNoJoinOperation(FunctionalTester $I) {
+        $I->wantTo('hasJoined by legacy version to some server without join call');
+        $this->route->hasJoinedLegacy([
+            'user' => 'random-username',
+            'serverId' => Uuid::uuid(),
+        ]);
+        $I->seeResponseCodeIs(401);
+        $I->canSeeResponseEquals('NO');
+    }
+
+}