docs: fix friend add example in user_guide

Reported in #71

docs/user_guide.rst

@@ -189,13 +189,13 @@ Example of sending a protobuf message and handling the response.
     from steam.enums.emsg import EMsg
 
     message = MsgProto(EMsg.ClientAddFriend)
-    message.body.steamid_to_add = 77777777777
+    message.body.steamid_to_add = 76561197960265728
 
     resp = client.send_message_and_wait(message, EMsg.ClientAddFriendResponse)
 
     if resp.eresult == EResult.OK:
-        print "Send a friend request to %s (%d)" % (repr(body.persona_name_added),
-                                                   body.steam_id_added,
+        print "Send a friend request to %s (%d)" % (repr(resp.body.persona_name_added),
+                                                   resp.body.steam_id_added,
                                                    )
     else:
         print "Error: %s" % EResult(resp.eresult)