How to change the error message on access login policy denied?

Hi, using Zero Trust access with SAML and it works well.
I have a policy that checks email and that email has been verified (additional SAML field) and the policy well filters the users:

  1. email not registered → deny
  2. email registered but not verify → deny
  3. email registered and verified → allow.

But when denied, users are show the same message and I would like to be able to tell them that they have to register for 1 and that they have to verify email for 2.

All error messages are the same: “That account does not have access”

Can we customise this for an application?