authenticate w/ hash, salt against database!
escape mysql query input string in auth
only queries left: list students in class, list admins, list non admins
database queries done!, now need to do updates/inserts/deletes
can create delete users, classes
update users, delete users, classes
all pages have expected behavior except batch deletes on class delete
batch delete users on class delete
batch user create on class create via file upload omg that took forever