Class - UserList
UserList:AddUser(user) - Saves game data using already assigned filename
UserList:CreateUser(user_id) - Makes a user object, assigns user_id, and calls Add
user_id:string - ID of the user to create and add
UserList:GetUser(user_id) - Gets a user from the list
user_id:string - User id of the user to get
UserList:RemoveUser(user_id) - Remove a user from the list
user_id:string - User id of the user to remove
UserList:HasUser(user_id) - Finds a user
user_id:string - User id of the user to find