Best way to run recurring command for every user

[Rami114]

I have a standard vb4 forum to which I'm now trying to add external API verification into the registration. This is game related.

I've added 4 custom profile fields, two to do with the api lookup itself (which the user must provide at registration time) and 2 for me to keep track of api lookup and api reported membership.

When a user registers, I make the API call with the provided details and check that a game user is returned who matches the supplied username (well multiple game chars might be returned by I check for the username). If that checks out the user is created.

Additionally, I want to grant a group membership based on a secondary piece of information I get from the game API (in-game guild name). I.e. if their guild name is ours, I give them member level access.

I've got some test code up and running to talk to the API, and I've been digging into the VB code itself to get a feel for it. At the moment I'm looking at modifying the registration code. That's the situation as I stand (in case anyone goes 'OMG don't do it that way! Do X!).

The main question is, what's the best way to run a cronjob that goes over every user, checks their API details are still valid and, where needed, updates membership. I quite like data managers, but they are only valid in the current user context and I'd really want to run this for every user.

Is this the best approach, should I do this differently?

Thanks in advance,

Rami