Select "One-time Password Authentication by app" on the "Settings for Identification Methods" page of Expo ID and follow the steps below.
For more information, please refer to section "2.2-B: Using an Authentication Application" of the Expo ID Registration Manual, which you can access via the link below.
＜General procedure>
(1) Download and launch a one-time password authentication app (Google Authenticator or FreeOTP Authenticator).
(2) Click "Copy key" on the Expo ID screen and copy and paste the 32-character code into the authentication app.
(3) Enter the 6-digit number displayed on the authentication app into the "One Time Password" field on the Expo ID screen.
4) Click the red "Register" red button on the Expo ID screen.
For more details, see section "2.2-C: Authentication by app." of the ExpoID Registration Manual.
ExpoID Registration Manual: