Restore bearer token section under Installation, remove dead POSTMAN_GUIDE.md link

README.md

@@ -72,15 +72,25 @@ For building from source, see the [src/README.md](src/README.md) file.
 AUTHELIA_API_DEVELOPMENT_MODE=true sudo ./install-authelia-api.sh
 ```
 
+**Get your bearer token:**
+
+- **Docker:** The token is whatever you set as `session.secret` in your `configuration.yml`.
+- **Bare metal:** Read it from your existing Authelia configuration:
+  ```bash
+  grep -A2 "session:" /opt/authelia/configuration.yml | grep "secret:" | awk '{print $2}'
+  ```
+
+Then test the API:
+```bash
+curl -H "Authorization: Bearer YOUR_TOKEN" http://localhost:8080/api/health
+```
+
 ## API Testing with Postman
 
 Postman collection and environment files are provided for API testing:
 
-- `authelia-api.postman_collection.json` - Complete API collection
-- `authelia-api.postman_environment.json` - Environment variables
-- `POSTMAN_GUIDE.md` - Setup and usage guide
-
-See [POSTMAN_GUIDE.md](POSTMAN_GUIDE.md) for detailed instructions.
+- `authelia-api.postman_collection.json` - Complete API collection with all endpoints
+- `authelia-api.postman_environment.json` - Environment variables (base URL, token)
 
 ## Files in This Repository