This would be the continuation from Part I. Login There would be a couple of items needed for the login feature:

Drupal 8 has provided some really small and helpful utilities. One of these utilities that I was able to make use of for a certain project was PrivateTempStore.

There would be instances where modules would need to include configurations or settings to configuration entities that are defined by other modules.

Validation constraints allow a lower level of validation for entities. Unlike in Drupal 7, validation usually comes from form validation handlers.