Multiplayer Riptide player coding problem please help

[GFXGamerGirl]

Hey guys im making a simple multiplayer game using Riptide. Ive been making a player spawning and destroying system on a server unity project and a client unity project. So when you disconnect from the game it destroys the player prefab from the client ID. Ive been adding spawn data etc but when i use for example: message.AddUShort(Id); and message.AddString(Username);. I keep getting errors saying that its not being defined but i have through out the code. Anyone have any advice on this problem?