docs(postman): add gRPC auth collection

README.md

@@ -69,6 +69,14 @@ Protected calls use metadata:
 authorization: Bearer <access_token>
 ```
 
+## Postman
+
+Postman helper files are available in `postman/`:
+
+- `Gapido Auth gRPC.postman_environment.json`
+- `Gapido Auth gRPC.postman_collection.json`
+- `README.md` with gRPC request setup steps
+
 ## Security Notes
 
 - OTP codes are generated with `secrets`, stored only as HMAC hashes in Redis, and expire after 120 seconds by default.