How to remember your user code the first time
Step 1: Enter your user code

Step 2: Tick the "Remember User Code" box
How to remove and add a new user code
Step 1: Go to the panel settings screen by clicking on the gear icon.

Step 2: Open the General settings section

Step 3: Untick "Remember User Code"

Step 4: Please close the app and reopen your panel. You can then reenter your code as explained at the top of this article.