private void AddButtons()
 {
     for (int i = 0; i < rest.AvailableUsernames().Count; i++)
     {
         GameObject newButton = GameObject.Instantiate(userButtonPrefab);
         newButton.transform.SetParent(contentPanel, false);
         UserButton userButton = newButton.GetComponent <UserButton>();
         float      minY       = 1 - .25f * (i + 1);
         float      maxY       = .25f + minY;
         userButton.setAtAnchors(new Vector2(0, minY), new Vector2(1, maxY));
         userButton.Setup(rest.AvailableUsernames()[i]);
     }
 }