MAPG-235 queries with relations on any recursion level implemented

src/Repository/UserInChallengeRepository.php

@@ -41,6 +41,17 @@ class UserInChallengeRepository
         return $this->pdm->selectFromDb($select, UserInChallenge::class);
     }
 
+    public function getByUserIdAndToken(int $userId, string $token_str): ?UserInChallenge
+    {
+        $token = hexdec($token_str);
+
+        $select = new Select(\Container::$dbConnection);
+        $select->where('user_id', '=', $userId);
+        $select->where('token', '=', $token);
+
+        return $this->pdm->selectFromDb($select, UserInChallenge::class, true);
+    }
+
     public function isUserParticipatingInChallenge(int $userId, Challenge $challenge): bool
     {
         $select = new Select(\Container::$dbConnection, 'user_in_challenge');