Docs: How to use AiiDA without ssh keys

[etiennemlb]

Describe the current issue

As a counterexample to most HPC centers, some believe using SSH keys is worse than using a password (what if your key does not have a passphrase and is leaked).

Describe the solution you'd like

What is the typical workflow to ease such use case ?

[negia7265]

Hey i am currently getting a good understanding of the codebase and wanted to get started with contribution, could you assign this issue to me it seems a good issue to begin with!!

[etiennemlb]

I'm not sure who should give you permission. Id say, go ahead, make a PR?

[unkcpz]

Thanks for bring this up @etiennemlb. I redirect to issue #6642 (so I close this one, please reply on that issue if you have any comment)

There was some discussion among the team. If I assumed correctly, the reason some of those HPC think it is safe because the password is not stored anywhere long term (it is stored in user's mind although :) ).
The problem is too make it work with AiiDA, every SSH operation with the remote resource it require this password attached, which means the password needs to be stored in the computer. It contradict with what those HPC think is safe.

I partly remember one conclusion is we need to ask user to communicate to HPC and explain the use case and find the solution together.