In the slack app you create a phone number, then you register that phone number with your google account. From now on any login challenge you receive on that phone number will be sent to slack.
If you have a team of multiple people, they would all be able too see and use that code if they triggered it.
This is much better than having to ask the person who's phone number is associated with the gmail account. As they may not answer in time.
For money.
There is definitely a shift in the industry to move away from SMS for 2FA, but unfortunately people still use SMS and not all services support authenticator codes, which is still a problem.
SMS to Slack makes it easy for less technical folks to have a similar setup. Also cheaper than a monthly mobile service subscription.
$5 buys you a decent mobile subscription in Hungary (for this use-case). Setting up Automate is just graph editing. It is not much easier to add apps to Slack itself.
Wish you the best of luck with the service though, there may be a need for this by non-technical people or in other regions.
I am working on adding support for a real phone number to solve for this shortcoming.
That's a good point! I was thinking about US-centric solutions.
Thank you for contributing to the conversation!