Add link to user.yaml guide

README.md

@@ -137,6 +137,7 @@ See detailed explanation [here](docs/additional_documentation/setup.md)
 
 1. [Terminologies](docs/additional_documentation/terminology.md)
 2. [Accessing Data](docs/additional_documentation/data_access.md#accessing-data)
-3. [Token management](docs/additional_documentation/token_management.md)
-4. [fence-create](docs/additional_documentation/fence_create.md)
-5. [Default expiration times](docs/additional_documentation/default_expiration_times.md)
+3. [user.yaml guide](docs/additional_documentation/user.yaml_guide.md)
+4. [Token management](docs/additional_documentation/token_management.md)
+5. [fence-create](docs/additional_documentation/fence_create.md)
+6. [Default expiration times](docs/additional_documentation/default_expiration_times.md)