Where can I find the T&C's for my customers?

"Terms of service" can be found under your member area:
https://diller.app/<your_club_name>/terms-of-service.

Information on Processing of personal data, marketing inquiries etc. can be found here: https://diller.app/<your_club_name>/privacy-policy.

The login page for your members can be found here: https://diller.app/<your_club_name>