There are 2 ways to complete the second-factor authentication upon login: SMS code or Authenticator app.
Admins can define how your team authenticates on the 2FA prompt in Settings > Security > 2FA:
This change applies to all users within the workspace.
Visit the following articles on how to set up your 2FA methods:
Set up the authenticator app as 2FA
Set up SMS code as 2FA
If you have trouble logging in, please see this article for the troubleshooting steps.