You can change your email address as you like. Write any username or generate a new one. You can also choose any domain name from the drop-down list or use the search (example: 'email*com' or '.com').
Prepare Finalists A For Of How Hackathon Learn Nvidia From To The Previous settings links:
Go to the specific mailbox: https://generator.email/[email protected]
Email Generator with a specific domain and random user: https://generator.email/mail-temp.com