Work on server data and registries.

src/main/java/appeng/core/features/registries/PlayerRegistry.java

@@ -21,6 +21,7 @@ package appeng.core.features.registries;
 
 import javax.annotation.Nullable;
 
+import appeng.core.AppEng;
 import com.mojang.authlib.GameProfile;
 
 import net.minecraft.entity.player.PlayerEntity;
@@ -28,6 +29,8 @@ import net.minecraft.entity.player.PlayerEntity;
 import appeng.api.features.IPlayerRegistry;
 import appeng.core.worlddata.WorldData;
 
+import java.util.UUID;
+
 
 public class PlayerRegistry implements IPlayerRegistry
 {
@@ -40,7 +43,7 @@ public class PlayerRegistry implements IPlayerRegistry
 			return -1;
 		}
 
-		return WorldData.instance().playerData().getPlayerID( username );
+		return WorldData.instance().playerData().getMePlayerId( username );
 	}
 
 	@Override
@@ -53,6 +56,19 @@ public class PlayerRegistry implements IPlayerRegistry
 	@Override
 	public PlayerEntity findPlayer( final int playerID )
 	{
-		return WorldData.instance().playerData().getPlayerFromID( playerID );
+		UUID profileId = WorldData.instance().playerData().getProfileId(playerID);
+		if (profileId == null) {
+			return null;
+		}
+
+		for( final PlayerEntity player : AppEng.proxy.getPlayers() )
+		{
+			if( player.getUniqueID().equals( profileId ) )
+			{
+				return player;
+			}
+		}
+
+		return null;
 	}
 }