This action runs when a user successfully joins a group.

do_action('profile_magic_join_group_additional_process',$gid,$user_id);

Simple example

function ProfileGrid_join_group_additional_call ($gid,$user_id)

{

//do something with the user id and Group ID when someone successfully joins a group.

}

add_action('profile_magic_join_group_additional_process','ProfileGrid_join_group_additional_call');