diff --git a/azalea-core/src/registries.rs b/azalea-core/src/registries.rs
new file mode 100644
index 00000000..605d7770
--- /dev/null
+++ b/azalea-core/src/registries.rs
@@ -0,0 +1,8 @@
+struct RegistryHolder {}
+
+fn make_network_codec() -> NetworkCodec {
+    // Codec codec = ResourceLocation.CODEC.xmap(ResourceKey::createRegistryKey, ResourceKey::location);
+    // Codec codec2 = codec.partialDispatch("type", mappedRegistry -> DataResult.success(mappedRegistry.key()), resourceKey -> RegistryHolder.getNetworkCodec(resourceKey).map(codec -> MappedRegistry.networkCodec(resourceKey, Lifecycle.experimental(), codec)));
+    // UnboundedMapCodec unboundedMapCodec = Codec.unboundedMap((Codec)codec, (Codec)codec2);
+    // return RegistryHolder.captureMap(unboundedMapCodec);
+}
diff --git a/azalea-protocol/src/packets/game/clientbound_login_packet.rs b/azalea-protocol/src/packets/game/clientbound_login_packet.rs
index fc701d9d..0e23460e 100644
--- a/azalea-protocol/src/packets/game/clientbound_login_packet.rs
+++ b/azalea-protocol/src/packets/game/clientbound_login_packet.rs
@@ -27,7 +27,7 @@ pub struct ClientboundLoginPacket {
     pub game_type: GameType,
     pub previous_game_type: Option<GameType>,
     pub levels: Vec<ResourceLocation>,
-    pub registry_holder: azalea_core::registry::RegistryAccess,
+    // pub registry_holder: azalea_core::registry::RegistryAccess,
 }
 
 impl ClientboundLoginPacket {
@@ -37,7 +37,7 @@ impl ClientboundLoginPacket {
 
     pub fn write(&self, buf: &mut Vec<u8>) {
         buf.write_int(self.player_id);
-        buf.write_bool(self.hardcore);
+        // buf.write_bool(self.hardcore);
         // buf.write_byte(self.game_type.
     }
 
@@ -47,11 +47,12 @@ impl ClientboundLoginPacket {
         let transaction_id = buf.read_varint().await? as u32;
         let identifier = ResourceLocation::new(&buf.read_utf().await?)?;
         let data = buf.read_bytes(1048576).await?;
-        Ok(ClientboundLoginPacket {
-            transaction_id,
-            identifier,
-            data,
-        }
-        .get())
+        panic!("not implemented");
+        // Ok(ClientboundLoginPacket {
+        //     transaction_id,
+        //     identifier,
+        //     data,
+        // }
+        // .get())
     }
 }
diff --git a/azalea-protocol/src/packets/game/mod.rs b/azalea-protocol/src/packets/game/mod.rs
index 73f66c33..932435d9 100644
--- a/azalea-protocol/src/packets/game/mod.rs
+++ b/azalea-protocol/src/packets/game/mod.rs
@@ -8,7 +8,10 @@ use tokio::io::BufReader;
 #[derive(Clone, Debug)]
 pub enum GamePacket
 where
-    Self: Sized, {}
+    Self: Sized,
+{
+    ClientboundLoginPacket(clientbound_login_packet::ClientboundLoginPacket),
+}
 
 #[async_trait]
 impl ProtocolPacket for GamePacket {