You are adding an entry to the backend menu. To do so you open a core etc/adminhtml/menu.xml file as a reference.
In the file you see the node:
What is the result of specifying resource=”Magento_Catalog::catalog”?
A . The menu item will only be visible to users who are assigned to a role with access to the matching ACL resource
B . The menu item will only be visible if the class method specified by the resource returns a true value
C . The last selected menu item for a user is stored in the DB so the previously visited page can be restored on the next login
D . The resource is used to locate the correct translation for the attributes listed in title=”…”
Answer: A
Explanation:
Reference: https://magento.stackexchange.com/questions/204879/consumer-is-not-authorized-to-accessresources-magento-2