Do you know if there is a way to display in a dashboard the users / entities access by user / the type of access (read, write...)
This can be accomplished through the pre-built method query UserEntityRights:
It is also a report in the Application Reports (RPTA) but you have to select a particular Entity at this time. An enhancement could be logged to also have all Entities shown at one time as well.
Thanks a lot @EricOsmanski , Yes, i think we need to raise an enhancement request to have the choice to display a particular entity, or all entities.