Add IVAO OAuth Scopes

Author: arthurpar06

docs/oauth/ivao.md

@@ -19,3 +19,13 @@ IVAO_CLIENT_SECRET={your_client_secret}
 You can retrieve your client ID and your client secret from the OAuth clients page after creating the client as explained above.
 
 Now, your users can link their IVAO account to their phpVMS account and use their IVAO account to log in. The link between the two accounts is automatically established when clicking the "Login with IVAO" button on the login page. However, if the email address of the IVAO account is different from the email address of the phpVMS account, it must be done manually on the profile page.
+
+
+## Customizing scopes
+
+You can add scopes to the OAuth request in addition to the default scopes by adding your scopes to the `.env` file, separated by commas.
+See [IVAO Scopes List](https://wiki.ivao.aero/en/home/devops/api/oauth-scopes)
+
+```shell title=".env"
+IVAO_SCOPES=scope1,scope2
+```