Automatically import/provision all Google Apps accounts?

Automatically import/provision all Google Apps accounts?

I'd like to introduce Zoho's Wiki service to all of our Google Apps users (our business has about 50 accounts). 

Is there any way to automatically import all of our Google Apps users' accounts into Zoho, so that I can begin establishing access control groups (etc) or do I need to wait until users sign in to Zoho for the first time, one-by-one?