Ability for users to add their own downloaders

[fsmeets84]

On my instance of NZBHydra2 running on Docker I added a second user, so we can both use one instance.
We both are using Torbox where we have both our own account and subscription.

Currently I can only add Torbox downloader on a system level instead of a user level. This means I had to add two Torbox downloaders, one for each user. Otherwise the other user should have send downloads to my account, he doesn't have access to my Torbox account.

The downside of adding two Torbox downloaders is that every user can see all "Add to Torbox" buttons. Which means we can still send downloads to the account of the other one.

Preferably a user should be a able to add their own downloader which is only accessible for that specific user. Another option is that the admin can link downloaders to user accounts (downside is that users have to share their api key).

[theotherp]

You're better off running to hydra instances (and do account sharing there, if you want).