Report as an email containing additional details
if the email address matches the username, provide associated data elements that have been breached. These could be as follows..
1. plain-text passwords, password hashes associated with the email add.
2. other PII .. address, phone#, IP, etc.
I subscribe to this HIBP notification service and came here after being informed that my email was among those in the Verification.io breach. Since only a subset of affected accounts had additional PII revealed, it would be useful to know if my particular email address(es) were so affected.