Return ID From INSERT

I'm sure there is a billion ways to do this but I'm trying to return the ID for the insert which would be the purchase id.

code:

IF EXISTS(SELECT [Email] FROM [dbo].[WBG_User] WHERE [Email] = @Email) BEGIN
			--Update Products
			UPDATE [dbo].[WBG_User]
			SET [User_Products] = [User_Products] + @ProductName + ';' 
			WHERE [Email] = @Email;

			--User Account Balance
			UPDATE [dbo].[WBG_User]
			SET [WBG_Coins] = [WBG_Coins] - @Amount
			WHERE  [Email] = @Email;

			--Create Receipt
			INSERT INTO [dbo].[WBG_Purchase]
			(Email, Product_Name, Purchase_Date, Purchase_Amount)
			VALUES
			(@Email, @ProductName, @PurchaseDate, @Amount)		
			SET @PurchaseID = (SELECT SCOPE_IDENTITY());
		END ELSE BEGIN
			SET @Response = 'No User Found';
		END

Currently returns as null