A.
Please select "Authentication by Email" on the "Settings for Identity Verification Methods" screen that appears after entering your Expo ID and password.
A disposable password with a six-digit number will be sent to the email address registered to your Expo ID. Enter the six-digit number from the email in the “Settings for Identity Verification Method” screen to complete set up.
Detailed instructions on how to set up your Expo ID can be found in section "2.2-A: Authentication by Email" in the Expo ID Registration Manual below.
ExpoID Registration Manual: