Opakovaná registrace response 500

Request
POST /api/auth/register HTTP/1.1
Host: memopad.script.projnull.eu
Content-Type: application/json
Content-Length: 46

{
  "username": "test",
  "password": "test"
}

Response 500
{
    "timestamp": 1759816785579,
    "status": 500,
    "error": "Internal Server Error",
    "path": "/api/auth/register"
}
