Not clear but I suspect the login is in the called db. If you can use a desktop shortcut to launch the called db you can pass a command line switch contained in the shortcut to the Cmd function written in code in the called db. That function will return the switch if it exists. If it exists, then code your called db so that it bypasses the login part. As long as a regular user cannot access the shortcut they will have to log in.
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.