FR: please support password authentication

[cerkut]

It seems only token authorization is supported, it would be nice to get support for password authentication per https://jupyter-server.readthedocs.io/en/latest/operators/security.html as well.
Thanks.

[prabhakk-mw]

Related to: #23

[krisctl]

We now support password authentication as well. Please see the video below for demo purposes.

JMP.30.mp4