Rework tests structure. Upgrade codeception to 2.5.3. Merge params configuration into app configuration.

api/tests/functional/_steps/AuthserverSteps.php

@@ -0,0 +1,26 @@
+<?php
+declare(strict_types=1);
+
+namespace api\tests\functional\_steps;
+
+use Ramsey\Uuid\Uuid;
+use api\tests\_pages\AuthserverRoute;
+use api\tests\FunctionalTester;
+
+class AuthserverSteps extends FunctionalTester {
+
+    public function amAuthenticated(string $asUsername = 'admin', string $password = 'password_0'): array {
+        $route = new AuthserverRoute($this);
+        $clientToken = Uuid::uuid4()->toString();
+        $route->authenticate([
+            'username' => $asUsername,
+            'password' => $password,
+            'clientToken' => $clientToken,
+        ]);
+
+        $accessToken = $this->grabDataFromResponseByJsonPath('$.accessToken')[0];
+
+        return [$accessToken, $clientToken];
+    }
+
+}