I can’t identify which Firefox Relay email I used for DASAD and need help finding it quick.

Hello Firefox Support, I am currently trying to access my account on a platform called DESAD (D-A-S-A-D), but I am unable to identify which Firefox Relay email address I used during registration. I have multiple Relay email masks, but I cannot determine which one is linked to the platform, and the Relay dashboard does not clearly show which email was used on specific websites. Because of this, I am unable to log in or recover my account. Please kindly help me confirm which Relay email was used for DESAD. Thank you for your support