Resolve WES-187 "Unit tests account and system"

Assets/Accounts/Scripts/User.cs

@@ -26,19 +26,16 @@ public class User
     /// <summary>
     /// Get the username
     /// </summary>
-    /// <returns></returns>
     public string GetUsername() { return storedUserData.username; }
 
     /// <summary>
     /// Get the total playtime
     /// </summary>
-    /// <returns></returns>
     public double GetPlaytime() { return storedUserData.playtime; }
 
     /// <summary>
     /// Get the avatar
     /// </summary>
-    /// <returns></returns>
     public Sprite GetAvatar() { return UserList.AVATARS[storedUserData.avatarIndex]; }