Best Bet way to use a users table from the Corp main file

I am bolting this on a small company system. I have got everything nice.
I have a company table that manages the User name and passwords. Basically its just a duplicate that is created of the FM level users and Passwords. Allowing them to create users. That is working fine. How is the best way get that data to move to FMspark creating the users either on the fly if they hit the fmspark or allow fmspark to get the user detail from the other file?
I hope this makes sense.
I have a company table that manages the User name and passwords. Basically its just a duplicate that is created of the FM level users and Passwords. Allowing them to create users. That is working fine. How is the best way get that data to move to FMspark creating the users either on the fly if they hit the fmspark or allow fmspark to get the user detail from the other file?
I hope this makes sense.