Mass users creation in BI

Dear experts,

I would like to create users in BI massively.

Could I do a mass upload from a flat file such as using USERS_GEN in others system? What are the available options?

In fact, I have all my users created in SRM.

How can I do to have them created in BI as well? Any synchronization tools?

Please note that we are not going to use CUA.

Thanks for your feedback.

chris b.