I am helping a friend, so I made a pledge to his Patreon, and when I login to his site, I get only the pledge to that user.
So I guess that when I login using my own account, I see all of my memberships, and when I login to another account, I see only that Patreon’s account.
But I do not see anything in identity resources. here is, with some info redacted, the output I get (links edited due to rescriptions of this board:
When I logged in to my own site, using my own credentials, I see my Patreon Creator account, and as such, I see all of the people I support on Patreon.
When I log in to my friend’s site, despite is being the same user, it is my supporter Patreon account, so I only see the pledge of my friend’s account.
Yes, you need your friend’s creator access token to access his Patreon campaign. If you have him authorize your app via a normal access token though, you could get his id from his user by using that token.