[keycloak-user] keycloak with angular/restfull

Hi I am doing an app with angularjs with keycloak. There a few things that I dont know how to do it, I have being seing the videos and reading documentation so I have 2 questions. Regarding the model of the database, how am I supposed to link Users to Tables. How do you recommend to work on the model, I am kind of cluless there. For example before I had a table User and a Table Pictures. Now my users are in the KeyCloak database, how are you supposed to handle tables that would have been linked to a user. My second question is about my front and backend. I am just allowing my users to upload pictures it is a small app. I am doing the front end with AngularJS so it is basically html+javascript, and the backend handles the services. Should I create a client in my KeyCloak for the frontend and another for the backend. It seems to my that I should create a client only for the backend , and the front end needs to validate against that. Thanks Juan Diego Calle