I would want to have a filed called temp_id (not null) stored for the members registering. I know i would have to create a column in database. Now in the signup form what has to be done.
Also, this temp_id once used for signing up on any one of the multiple domains that GM is set for, then the same should not be usable for further signup on any of the domains. What needs to be done.
Basically, just like username is unique for a given domain, i would want that temp_id should be unique for the complete GM (supporting 5 domains for example). This means a given temp_id should only be usable for once and should display error message if attempt is made to use the same for an additional account on any of the domains.
Any help and suggestion?