If you've implemented two-step verification, but haven't successfully received a verification code through the method you chose, you can click the Can't Sign In? link in Step Two of the login process. Contrast will then email a temporary code to you, which is valid for five minutes. You can also use a backup code.
If email is already the chosen notification method, contact your Administrator to investigate potential issues with email settings.
Reset Your Device
If you're having issues with Google Authenticator, you manually reset your device by clicking the Reset Device link in User Settings. This clears all data for the current device and requires resetting Google Authenticator on the same or a new device.