Can't access Piwik accounts that have 2FA enabled

[MagicFab]

When this plugin is installed and 2FA is enabled for an account, the application simply returns an authentication error:
https://github.com/sgiehl/piwik-plugin-GoogleAuthenticator

One way would be to implement OAuth, another to implement app-specific passwords in the 2FA plugin. IANASE (I'm not a security expert!), just bringing attention to this issue when 2FA is enabled.

Piwik's / PIwik Mobile's FAQ could highlight this and suggest to use a separate account dedicated for mobile use, for viewing only (the most probable use case on mobile).

[tsteur]

FYI: This kinda depends on matomo-org/matomo#6559 which I created about a year ago. I don't see it implemented soon though

[tsteur]

I think this is implemented by now and supports Matomo core 2FA feature 👍