In order to set this up correctly and validate it works, we’ll need an admin account on both the WordPress and the Discourse sites. We’ll ask you to send an invite to firstname.lastname@example.org for both ends. We’ll take it from there.
We should also note that the typical method here is to use the WordPress site as the source of the accounts. But if you want Discourse to be the provider of accounts, just let us know. This service works both ways.