docs: clarify the MyOpel security PIN

README.md

@@ -34,6 +34,10 @@ proprietary CloakBrowser binary. No prebuilt images are published.
    the app.
 3. Follow the complete guide in [stelloauth/DOCS.md](stelloauth/DOCS.md).
 
+When the integration asks for a security PIN, enter the four-digit PIN you
+chose when activating Remote Control in the MyOpel app. MyOpel does not send
+you a new PIN; the SMS verification code is separate.
+
 ## Pinned upstream sources
 
 | Component | Version | Commit / OCI index digest |

stelloauth/DOCS.md

@@ -34,6 +34,10 @@
 6. Select **Brand: Opel** and **Country: DK**, then complete the integration's
    OAuth setup with your MyOpel details.
 
+   When asked for a security PIN, enter the four-digit PIN you chose when
+   activating Remote Control in the MyOpel app. Do not wait for MyOpel to send
+   you a new PIN; the SMS verification code is separate.
+
 7. The app provides three options:
 
    - `queue_timeout`: how long a login attempt may wait for the single session.