Thanks,
could anyone return to me with an official reply and a code sample?
As I need to decide whether to pay for the yearly plan to achieve this feature or create a client that can handle this, which is redundant work and an asset to host, deploy, manage, etc".
You didn’t need it, but the use case is so basic, and probably very required for many others. I think it should be implemented in the “roles” settings, with the checkboxes, where you would simply have an input allowing you to limit the number of items a role can add.
Thanks.