When users join VideoBiker, they are added to a mailing list at SendinBlue. They receive automated emails relevant to the list they joined. SendinBlue can then move a user to a new mailing list based on a url that they view. We notice that when a user pays/upgrades their Membership 2 Pro membership, that the page they are redirected to has '?ms_relationship_id=' on the end. Is there any way that we can make this '? string' show their upgraded membership level? We are looking for a way to inform Sendinblue that a user has upgraded based on the url.