The Drupal console makes use of the Symfony console and other third-party components that automatically generate most of the code needed for the Drupal 8 module. In addition to this, the console allows you to interact with your Drupal project.
This helpful article shows how programmatically restricts an access to individual pages of a site without using heavy modules and using only one field and a few lines of the code.
Here's how to do it with an entity builder callback without any additional contrib module like "Automatic Entity Label" or "Automatic Nodetitles", using only Drupal core functionality.
How render/override/customize/theme any drupal form with and without a custom template? Easy!