Go to Access Manager Identity Server page: http(s)://<idp server >:<port>/nidp.
Select the contract where TOTP is configured as the second method for two-factor authentication.
Log in with the first method.
Click the link beside Please register for two factor authentication to generate a OTP. Make a note of the secret key displayed.
If you have installed the TOTP client on your device, scan the code. You can also manually enter the secret key in the TOTP mobile client. After the registration is complete on the TOTP client on your mobile, the OTP is displayed.