Customize LDAP Error Message when Invalid Login Occurs

Use case

Users on the network are required to have a Gitlab entitlement for access. We would like the ability to change/update the error message, " Could not authenticate you from Ldapmain because "Invalid credentials for xxuser"." to "Could not authenticate you because you are missing the Gitlab entitlement, or Invalid credentials for xxuser"

Proposal

Add the ability to customize the LDAP error on GitLab.