Add password parameter to uvc component

[nunofgs]

Description:

Fixes an issue where the UVC component would not properly authenticate.

The uvcclient requires that the camera password is stored in a JSON file in ~/.uvcclient by default.

The current integration Home Assistant is defaulting to the ubnt password but does not work for users that are using another password.

I really don't see how this ever worked for users that changed the default ubnt password. It probably never did which is why so many users are reporting problems.

This PR removes the "store" codepath and simply allows a password argument to be passed for the component.

Related issues:

Fixes #2979.
Fixes #7151.
Fixes #3810. (in my opinion)

Related community issues:

• https://community.home-assistant.io/t/unifi-video-compatibility/4339
• https://community.home-assistant.io/t/unifi-camera-component-not-working/6679
• https://community.home-assistant.io/t/unifi-nvr-issue/14473
• https://community.home-assistant.io/t/unifi-nvr-issue-2nd-post/14723

Pull request in home-assistant.github.io with documentation: home-assistant/home-assistant.io#2600

Example entry for configuration.yaml:

camera:
  - platform: uvc
    nvr: IP_ADDRESS
    key: API_KEY
    password: PASSWORD

Checklist:

• Documentation updated in home-assistant.github.io
• Local tests with tox run successfully.

[mention-bot]

@nunofgs, thanks for your PR! By analyzing the history of the files in this pull request, we identified @kk7ds, @fabaff and @balloob to be potential reviewers.

[houndci-bot]

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[houndci-bot]

continuation line under-indented for visual indent

[JshWright]

This looks good to me. If ~/.uvcclient is a standard convention, is it worth looking there as well? (Password resolution order would be: HA config -> ~/.uvcclient -> default)

[nunofgs]

If ~/.uvcclient is a standard convention, is it worth looking there as well?

It doesn't appear to be. It is specific to this python library and a google search reveals that is is largely undiscovered.

In my opinion there is little benefit in supporting this file.