I'm using the app and game groups API atm and am trying to let users Join app groups that they see while browsing. I've researched how to do this and am not sure how to do this.
It seems that I would have to issue a user to user request from the user wishing to join the group to the admin of the group however, after looking at the Facebook requests documentation it is seems that user-user requests are only possible through canvas apps. WTF.
Is this true and how would I issue a user to user request for someone to join a group?
Please Stackoverflow help me.. You are overflowing with solutions!
Your app just needs to post to /GROUP_ID/members/USER_ID where USER_ID is the current user's FB id. See the Add User to Group documentation here.
If the group is closed then the admin should automatically receive a request to join (sent by Facebook itself) and then be able to approve it.