I have a use case that is stumping me a bit.
I have a WordPress Site that makes heavy use of Gravity Forms to create robust user profiles. My users have the ability to email a non-user and ask them a yes/no question.
I can't seem to come up with a good way for the non user to click a yes or no link in the email and have the clicked yes/no link update the user's profile with their response.
I basically need to allow a non-user to set a meta field value to yes or no for the user who sent the email. Being a non-user they dont have an account / are not logged in and would need to be setting the meta value for an established user who has the meta key attached to their profile.
Any ideas how I could achieve this?