The creation of users is linked yes or yes to emails, it would be good if the system administrator can configure them at their convenience according to the taxonomy they define (cards, initials, combinations, others, etc.) and that logically the number of users is limited to the contracted capacity.

In addition, in the permissions per module it is possible to define which documents and reports are accessible to the user, in other words, access to a module does not give permissions to all the options of the module if it is not considered convenient.

It's very expensive to do all that email validation when security could be controlled by the administrator.