i have a 3 screen in my application. i want that a 3rd person who is not admin as well as user of my app try to assess my screen then he got a messages " you have not access ". so please healp me. how to do?

Hello Harish, 

Are you evaluating the platform or are you developing? 

The online training teaches how to do what you're asking, So I recommend it. 

By default, only the users with the roles selected on the Roles section on the screen properties will have access to the page. Any other user will be redirected to login page or to the invalid permissions page.