Auth How To notebook

[jacquesalice]

From DLS-509, this notebook demonstrates:

• login
• logout
• authorized
• find
• retrieve

Use 4 users: [email protected], [email protected], [email protected], Anonymous

For the cells that output expected errors and warnings, I wasn't sure if I should make it "pretty" by putting it in a try/except block or just show the full error/warning message as the user would see it if they ran the cell as-is?

[pothiers]

ran with VPN on my local machine. Worked as expected. Notebook has no secrets. (Although the notebook won't be installed in client pip-install, its still visible in public repo,