Reapply "Fix LimboAPI login injection on Velocity-CTD (DEFAULT_PERMISSION_RESO…" (Elytrium#239)

This reverts commit 4f1d58d.

Author: WouterGritter

plugin/src/main/java/net/elytrium/limboapi/injection/login/LoginTasksQueue.java

@@ -292,9 +292,19 @@ private void connectToServer(Logger logger, ConnectedPlayer player, MinecraftCon
       PROFILE_FIELD = MethodHandles.privateLookupIn(ConnectedPlayer.class, MethodHandles.lookup())
           .findSetter(ConnectedPlayer.class, "profile", GameProfile.class);
 
-      Field defaultPermissionsField = ConnectedPlayer.class.getDeclaredField("DEFAULT_PERMISSIONS");
-      defaultPermissionsField.setAccessible(true);
-      DEFAULT_PERMISSIONS = (PermissionProvider) defaultPermissionsField.get(null);
+      PermissionProvider defaultPermissions;
+      try {
+        Field defaultPermissionsField = ConnectedPlayer.class.getDeclaredField("DEFAULT_PERMISSIONS");
+        defaultPermissionsField.setAccessible(true);
+        defaultPermissions = (PermissionProvider) defaultPermissionsField.get(null);
+      } catch (NoSuchFieldException e) {
+        Field defaultPermissionResolverField = ConnectedPlayer.class.getDeclaredField("DEFAULT_PERMISSION_RESOLVER");
+        defaultPermissionResolverField.setAccessible(true);
+        PermissionFunction defaultResolver = (PermissionFunction) defaultPermissionResolverField.get(null);
+        // Velocity-CTD does not expose DEFAULT_PERMISSIONS; adapt its resolver to the PermissionProvider contract.
+        defaultPermissions = subject -> (PermissionFunction) defaultResolver;
+      }
+      DEFAULT_PERMISSIONS = defaultPermissions;
 
       SET_PERMISSION_FUNCTION_METHOD = MethodHandles.privateLookupIn(ConnectedPlayer.class, MethodHandles.lookup())
           .findVirtual(ConnectedPlayer.class, "setPermissionFunction", MethodType.methodType(void.class, PermissionFunction.class));