I would only use it if I needed to create a quick MVP/PoC but then I'd fastly run to implement it once the idea is validated. In addition to the reasons already

I would only use it if I needed to create a quick MVP/PoC but then I'd fastly run to implement it once the idea is validated. In addition to the reasons already mentioned here, I'd say login is one of those features every language has a ready-to-use library for. Also, it might be that a certain ACL is required too, which is typically very specific for your domain.