Data Pointer Sashido

Guys, I’m working in a social media app so i created a table “Class” in sashido to record the users login name and password and i couldn’t find a way to access an other template table " another class " in which i plan to record users informations like name, last name etc…
i see in sashido that you can make a pointer or a relation between two table and i could’t know how to access it and controle it from appgyver.

Please help me and if someone can suggest something else, your welcome.
Thanks alots