Fix #889

@ljacqu please check

src/main/java/fr/xephi/authme/service/BungeeService.java

@@ -3,12 +3,15 @@ package fr.xephi.authme.service;
 import com.google.common.io.ByteArrayDataOutput;
 import com.google.common.io.ByteStreams;
 import fr.xephi.authme.AuthMe;
+import fr.xephi.authme.hooks.BungeeCordMessage;
 import fr.xephi.authme.initialization.SettingsDependent;
 import fr.xephi.authme.security.crypts.HashedPassword;
 import fr.xephi.authme.settings.Settings;
 import fr.xephi.authme.settings.properties.HooksSettings;
 import fr.xephi.authme.util.BukkitService;
+
 import org.bukkit.entity.Player;
+import org.bukkit.plugin.messaging.Messenger;
 
 import javax.inject.Inject;
 
@@ -20,6 +23,9 @@ public class BungeeService implements SettingsDependent {
     private AuthMe plugin;
     private BukkitService bukkitService;
 
+    @Inject
+    private BungeeCordMessage bungeeCordMessage;
+
     private boolean isEnabled;
     private String bungeeServer;
 
@@ -103,5 +109,15 @@ public class BungeeService implements SettingsDependent {
     public void reload(Settings settings) {
         this.isEnabled = settings.getProperty(HooksSettings.BUNGEECORD);
         this.bungeeServer = settings.getProperty(HooksSettings.BUNGEECORD_SERVER);
+        Messenger messenger = plugin.getServer().getMessenger();
+        if(!this.isEnabled) {
+            return;
+        }
+        if(!messenger.isIncomingChannelRegistered(plugin, "BungeeCord")) {
+            messenger.registerIncomingPluginChannel(plugin, "BungeeCord", bungeeCordMessage);
+        }
+        if(!messenger.isOutgoingChannelRegistered(plugin, "BungeeCord")) {
+            messenger.registerOutgoingPluginChannel(plugin, "BungeeCord");
+        }
     }
 }