If you have lost your device, enter your Expo ID and password from a new device, log in and click "Click here to reset your Identity Verification Methods" on the identity verification page. After filling in your details, you will be automatically logged out. Log in again and follow the instructions on the screen to set up an identity verification method as if you are logging in for the first time. After this you will be able to log in normally from your new device. If you have set up "Authentication by email" as your identification method, you can log in and confirm your identity without having to do anything in particular.