I am migrating an SQL database from one server to another. I backed up the database from the server that is operational and restored that backup to the new server. All of the logins apparently were restored, but none of them work. Under security for the SQL server, there are no logins listed - under users for the sql database, all of the logins are listed. I cannot add a login to the security/logins because the users already exist in the database. Is there a way to solve this issue without deleting and recreating all of the users?