Registration for existing users

We’re using Authorize.net for WP, a plugin that helps us accept donations. Ran into a problem between s2member and that plugin that I wondered if you could speak to:

When someone donates with Authorize.net for WP, the plugin creates an account and username for them where their username is the same as their email address.

Then if that person later decides to register as a member, WP won’t allow it because “that email address is already registered”.

Is there a way to find that account that is tied to the email address and then simply upgrade that account during the registration process?

Hi there. Thanks for your inquiry.
~ I sincerely apologize for the delayed response.

It sounds like that 3rd-party application might need to make use of this WP function.
http://codex.wordpress.org/Function_Reference/username_exists

We’ll be happy to assist in any way that we can. Feel free to invite the developer of this other plugin to write in through our Community Support Forums, or investigate the core WP function I mentioned.

So the user first donates and Auth.Net WP creates an account for him, then if you want him to upgrade through s2Member, he’d need to be logged in to that account.

For an account upgrade to happen, the user has to be logged in to his account or s2Member will assume he doesn’t have one and will take him to the registration page after payment.

Does that help?

OK, yes that helps. So as long as they are able to log in to their previously created account, then s2member can upgrade their membership using the upgrade forms that I’ve created. Got it.

Thanks again.

Cool. :)