Symfony 3.4 user authorization, writing algorithm and what to read?

Question

symfony

For the application, I need to make it so that all non-registered users go directly to the registration page, and if they are authorized, they calmly visit the site pages. I’m reading off documentation, I seem to understand how to make registration and authorization forms, but how then in other parts of the code to understand what kind of user?
In general, you can share links to articles (available in English), or even better, briefly describe the algorithm for performing this task. Thank you )

Answer 1

https://knpuniversity.com/screencast/symfony-security