You can change your Two-Factor Authentication method by following the below guide:
All you need to do is deactivate one method then enable the other method.
Log in to your account.
Click on Settings, click on Disable 2FA, a message would be sent to your phone, enter the 6-digit code then click on Disable.
Once you have deactivated one method, you will just need to activate the other.
Click on Settings.
Click Enable 2FA, scan the QR Code that will be on the authenticator app or manually enter it, enter the 6-digit code then click on Submit.
If your authenticator app does not let you scan the code, click on “Unable to Scan? Try entering the code manually” and a code will pop up for you to enter.