MFA (multi factor authentication) Support

[tpcgold]

Since Tableau requires MFA from 1st February 2022 onwards:
https://help.salesforce.com/s/articleView?id=000356005&type=1

Please add a process flow for MFA to the official TSC library

[jacalata]

MFA workflows are designed for interactive user interfaces - since APIs are expected to work without a user actively available, MFA is not required for API logins in Salesforce products.
To use this library we do recommend creating a Personal Access Token and using that as your credential, since they can be revoked more easily than a password.