You can declare it by this way....:)
INSERT INTO [dbo].[shopw_users]
([generalids], [username], [email], [password], [allowedips], [realname], [initials], [salesperson], [ccaccess], [timemade], [defaultshop], [dailystat])
VALUES
(@generalids, @username, @email, @password, @allowedips, @realname, @initials, @salesperson, @ccaccess, @timemade, @defaultshop, @dailystat)
SET @Output = CAST(@@IDENTITY AS [nvarchar] (max))