If you are Spotify, it provided a seamless experience for millions of people to sign up for their service. Now they have a lockin problem, and need to figure ou

If you are Spotify, it provided a seamless experience for millions of people to sign up for their service. Now they have a lockin problem, and need to figure out how to migrate those accounts to another authentication service. And for Communication, you never use Slack? It's useful to segment your communications by type, I don't want to give random Tinder ladies my home phone number.