Update to latest snapshot.

api/src/main/java/net/md_5/bungee/api/connection/PendingConnection.java

@@ -36,4 +36,11 @@ public interface PendingConnection extends Connection
      * @return the accepting listener
      */
     ListenerInfo getListener();
+
+    /**
+     * Get this connection's UUID, if set.
+     *
+     * @return the UUID
+     */
+    String getUUID();
 }

api/src/main/java/net/md_5/bungee/api/connection/ProxiedPlayer.java

@@ -99,4 +99,11 @@ public interface ProxiedPlayer extends Connection, CommandSender
      * @param server the server to set
      */
     void setReconnectServer(ServerInfo server);
+
+    /**
+     * Get this connection's UUID, if set.
+     *
+     * @return the UUID
+     */
+    String getUUID();
 }