Want to register a team for FAUST CTF 2019? There you go:

Your authorative contact address. It will be used for sensitive requests, such as password resets or prize pay-outs.
A less authorative contact address, e.g. your team's mailing list (may also be identical to the formal email). It will receive all relevant information for participants.
Optional Your logo or similar.
Optional Your university for academic teams, your team's hacker space or similar.