Recover my original azure system generated username and password

Question

I created a free Azure account recently for my practice sessions. The username and passwords were system generated and I didn't save them anywhere. During my practice sessions, I invited a guest account. I logged in using the guest account and realised I cannot do any admin task on the azure. Therefore I wanted to go back and login with the system generated account. Unfortunately I didn't save these credentials initially. Now it appears I cannot recover my account. Is there a way to recover my account

I invited a guest account and wanted to test if the guest account would managed admin tasks on the azure account