Feature Request - Revoke access to an activity

[Jatinpandya26]

Is your feature request related to a problem? Please describe.
Changing a gym trainer or not in need to share your physical activity with your previous doctor or friend should be simple by removing the access for your activities that don't need to be public to someone.

Describe the solution you'd like
We need a feature that allows people to remove anyone who is can see their activity in the application. This allows people to remove someone whom they have added by their atSign to not be able to access a certain single or more activity.

You can start the solution by getting started from at_onboarding widget. The at_onboarding is a plugin that allows users to quickly onboard any new sign-in protocol app with their atSignusername. An atSign is a handle (i.e. @alice) that functions as your digital identity. Also, it uses end-to-end encryption to ensure that you can completely control and own the data.