Followings

Tuitter::follow : Follows the user specified by the screen name
Tuitter::followById : Follows the user specified by the user ID
Tuitter::isFollowed : Tests whether the authenticating user is followed by the user
Tuitter::isFollowing : Tests whether the authenticating user is following the user
Tuitter::unfollow : Unfollows the user specified by the screen name.
Tuitter::unfollowById : Unfollows the user specified by the user ID