User accounts at eagle.io have the option of two-factor authentication to provide additional security (in addition to username and password).
This level of authentication is provided by a third-party system, external to eagle.io, that generates the 2FA tokens required during login. However, if you become locked out from this system (e.g. if you have lost your phone or forgotten the password of your 2FA provider), eagle.io is unable to reset or recover these details, and you will not be able to log in until 2FA is manually disabled on your account by eagle.io support.
In this situation, our policy for disabling 2FA is for you to email firstname.lastname@example.org directly from the email address that you normally use to log in to eagle.io, and ask for 2FA to be disabled. Once we have verified your identity we can disable 2FA on the account, which will allow you to log in normally with username and password again.
For security reasons, we can't disable 2FA on behalf of other users (otherwise it defeats the purpose of having it).