Where do I enter the Google Authenticator setup key?

Where do I enter the Google Authenticator setup key?
Procedure

From your device, open the Google Authenticator app.
Tap +.
Tap Enter a setup key.
Enter the following details: A name for the account, for example, Commvault or the name of your CommCell. The secret key provided in the email.
Verify that the key type is time based.
Tap Add.

Procedure
  1. From your device, open the Google Authenticator app.
  2. Tap +.
  3. Tap Enter a setup key.
  4. Enter the following details: A name for the account, for example, Commvault or the name of your CommCell. The secret key provided in the email.
  5. Verify that the key type is time based.
  6. Tap Add.