Turn off two factor authentication

Here are the instructions for removing two-step verification (two factor auth)

https://www.xfinity.com/support/articles/enroll-2-step-verification

Manage Your Two-Step Verification Contact Information

You can change or remove the mobile phone number and email address associated with Two-Step Verification at any time by following the steps below:

1. Sign in to My Account with your Xfinity ID, password and verification code.
2. Select the Users tab in the menu bar at the top of the page.
3. Select a user to update and select Edit next to that user.
4. Navigate to Contact Information and select Edit next to phone number or email field.

Note: Removing your email address or mobile phone number will automatically turn off Two-Step Verification, as we will no longer have a way to contact you to receive the verification code. If you change your email address or mobile phone number, don't forget to turn Two-Step Verification back on in the Settings section of My Account.