This is pretty much exactly what we built at WorkOS. (I work there.)
Check it out: https://workos.com/
And our Show HN launch a few years ago: https://news.ycombinator.com/item?id=22607402
Check it out: https://workos.com/
And our Show HN launch a few years ago: https://news.ycombinator.com/item?id=22607402
It seems like an underserved market.