public void SetUp()
 {
     handler = new UsernameHandler("mykey123")
     {
         InnerHandler = new TestHandler()
     };
     client = new HttpClient(handler);
 }
    // Start is called before the first frame update
    void Start()
    {
        _database = FirebaseDatabase.DefaultInstance;

        usernameHandler = GetComponent <UsernameHandler>();
    }