I use default sign up page in my site and I built a custom form in users' profile page. However I want to store datas from that custom form in a collection named MembersInfo separately from PrivateMembersData. First three fields of MembersInfo collection should get the login email, name and surname of current users from PrivateMembersData. All other fields should be filled according to the custom form that a user will complete so that I'll be able to know which user has completed the form. I couldn't figure out how to do this, pls help me!