Regenerating files.
diff --git a/grpc.def b/grpc.def
index 4b181bf..8b5f9cc 100644
--- a/grpc.def
+++ b/grpc.def
@@ -106,6 +106,7 @@
     grpc_composite_channel_credentials_create
     grpc_composite_call_credentials_create
     grpc_google_compute_engine_credentials_create
+    grpc_max_auth_token_lifetime
     grpc_service_account_jwt_access_credentials_create
     grpc_google_refresh_token_credentials_create
     grpc_access_token_credentials_create