Moving users away from Patreon Login

Hi everyone. I have a question. I’ve got a client who runs a Discourse Forum that is accessible from a Patreon Login. He is wanting to move away from Patreon to his own subscription system via a Wordpress plugin (Memberpress).

My question is, if a user who signed up via Patreon decides to cease their Patreon subscription but wants to move to this new system via Wordpress, what happens to their account information? Is there a way to associate all of the account information (post history, etc.) with this new login that will be generated through Wordpress?

As long as the email address matches, users can switch between sign-in platforms without any impact.