Better credential management

[jl-wynen]

This issue covers multiple subtopics and needs some discussion / design considerations that affect not only Scitacean but also the SciCat backend and file servers.

SciCat

• Is there a way to log in via the browser such that Scitacean doesn't have to handle passwords?
• Cache token in keychain
• Store expiry date with token and ask for re-login if expired
• To what extend can this be customised?

File Transfer

Ideally, we would share a login between SciCat and the file server. But this needs changes in the backend. We need to see if anything happens on that side.

Documentation

Need precise docs for how this works so users can troubleshoot.

[nitrosx]

Should we super-seed this ticket with a new one with title: design and implement better credential management and document use cases and customization?

[jl-wynen]

Updated the description. Is this what you had in mind?

[nitrosx]

Yes. I just took a long route to explain myself