Legal advice

I have a question about the terms and conditions of privacy, not for me as the owner of a blynk account that is accepted when you sign up, but how to do the same for my clients or users who are going to request information such as name, email, etc… to register them as users of the device.
My question is what should I do to legally protect myself on the privacy terms and conditions of my company before clients or end users.
Thank you very much in advance.

I would have thought that as you are based in Europe you should start here…

Pete.