SQL Server - Automatically mapping a user to a login, creating a new login if it is required

The following example shows how to use Auto_Fix to map an existing user to a login of the same name, or to create the SQL Server login Mary that has the password B3r12-3x$098f6 if the login Mary does not exist.

USE DataBaseName;
GO
EXEC sp_change_users_login 'Auto_Fix', 'Mary', NULL, 'B3r12-3x$098f6';