Users can create an account, and enter in your community ID in the "Join Community" popup.
Users can search using your community ID and can press the "Join" button to add your community.
From there, users can select your community card in the "My Communities" section to log into your CAD.
The join community modal allows users to search for a community ID
Forgot your community ID?
You can find this in your admin panel under Advanced > Limits > Community ID