For which, Slack or Twilio? We have a basic twilio account, paying $1/mo for the phone number, and $0.1/msg or whatever it is. On Slack, we have a paid accoun

For which, Slack or Twilio? We have a basic twilio account, paying $1/mo for the phone number, and $0.1/msg or whatever it is. On Slack, we have a paid account at the standard level, we've had that for years. One note, both Google and Apple detect that our number is Twilio, and won't let us use it for 2FA, sadly (our original use case).