I'm the founder and president of a group of BMW bikers. Until now the registration at the group was free and we've asked $25 for the forum registration. The site run on Wordpress and the forum on Xenforo. I use one plugin on the WP site for the members registration and they can say yes or no to the forum registration. If they say yes I send them an invite from the forum so they can register and pay the annual fee. What I'd like to do now is to introduce the membership fee also for the registration at the group so there's no more free subscriptions. Problem is how to to that since I'd have to collect all the new member's data on the WP site, send him an invite from the forum and approve them on the WP site once they've registered and payed the fee directly on the forum. Can someone suggest me a better way to handle all the procedure? Any idea to streamline the process or to make wordpress and XF communicate? I'm not a coder so I'm not able to write addons or plugin. I would prefer to hear some suggestion to do that without any external addon if possible. Thanks!