How can i create an app with users validation

Hello everyone!
I am starting in the world of No Code and the first problem I have is that the application I develop needs a user type verification, to access different views and permissions. What I cannot afford is the plan that appsheet offers per user, because I should pay a lot of money per month for the number of users that the application has, is there any other way to face this situation?
This application is for a company that will not pay the price for so many users