Login plugin request and response

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_12_2to1_13/packets/PlayerPacket1_13.java

@@ -9,6 +9,7 @@ import us.myles.ViaVersion.api.minecraft.Position;
 import us.myles.ViaVersion.api.minecraft.item.Item;
 import us.myles.ViaVersion.api.remapper.PacketHandler;
 import us.myles.ViaVersion.api.remapper.PacketRemapper;
+import us.myles.ViaVersion.api.remapper.ValueCreator;
 import us.myles.ViaVersion.api.type.Type;
 import us.myles.ViaVersion.packets.State;
 import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ChatRewriter;
@@ -17,6 +18,25 @@ import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.packets.InventoryPacke
 public class PlayerPacket1_13 extends Rewriter<Protocol1_12_2To1_13> {
     @Override
     protected void registerPackets(Protocol1_12_2To1_13 protocol) {
+        // Login Plugin Request
+        protocol.out(State.LOGIN, 0x04, -1, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper packetWrapper) throws Exception {
+                        packetWrapper.cancel();
+                        packetWrapper.create(0x02, new ValueCreator() { // Plugin response
+                            @Override
+                            public void write(PacketWrapper newWrapper) throws Exception {
+                                newWrapper.write(Type.VAR_INT, packetWrapper.read(Type.VAR_INT)); // Packet id
+                                newWrapper.write(Type.BOOLEAN, false); // Success
+                            }
+                        }).sendToServer(Protocol1_12_2To1_13.class);
+                    }
+                });
+            }
+        });
 
         //Plugin Message
         protocol.out(State.PLAY, 0x19, 0x18, new PacketRemapper() {