Implementing passwordless authentication

[thangngoc89]

I received some feedbacks that users don't like to hand me their Github's email and asking for another login method.
I think it's a reasonable request.

Since I don't like the ideas of handling user passwords, I want to implement passwordless login instead https://passwordless.net/ .

There is already an passwordless user_identity_type in the database schema, you can follow the github auth example to implement and passwordless option.

https://github.com/Sketch-sh/sketch-sh/blob/fd75d692784bb21a55575eb94343b8928fcddfba/server/auth/server.js