Blocks the user specified in the username parameter as the authenticating user. Destroys a friendship to the blocked user if it exists.
http://api.ogoing.com/friendships/block_user
xml
True
true/false
http://api.ogoing.com/friendships/block_user?username=user110&password=user110&portalname=http://www.ogoing.com&FollowUserName=abc