Update Application Passwords handling for WordPress 5.6

[jeffpaul]

Is your enhancement related to a problem? Please describe.
When WordPress 5.6 is released, currently scheduled for 8 December 2020, we will want to handle for the scenario where Application Passwords is now available in WordPress core as it was merged as part of the 5.6 Beta 1 release.

Describe the solution you'd like
This issue will help us track discussion on how best to handle for this scenario

Designs

Describe alternatives you've considered
n/a

Additional context
n/a

[jeffpaul]

Related: https://make.wordpress.org/core/2020/11/05/application-passwords-integration-guide/

[geertvdheide1]

I'm just a new user of this plugin, but isn't this issue urgent by now? WP 5.6 is scheduled to be released in a few days. Will everything continue to work on Wordpress 5.6? Won't the plugin at least need a check to see if the Application Password class already exists (from native WP) and use that if it does?

Also, the settings screen of the plugin still recommends installing Application Passwords as a separate plugin, while it's actually provided with Distributor. Trying to activate the separate plugin of course throws a fatal error because the class is already defined. This is out of date and should no longer be recommended. This point could be fixed together with any changes surrounding Application Passwords needed for WP 5.6.

[jeffpaul]

Just tested on a new WP 5.6 RC4 install, installed and activated Distributor 1.6.1, and the User Profile now presents two Application Passwords sections:

On a network install, with a preexisting External Connection, it similarly duplicates the Application Passwords section in the User Profile and also duplicates the reference to the external connection:

The network site was able to still distribute to internal and external connections, the remote site was able to distribute back to the origin site in the network as well. So all Distributor functionality appears to work as expected, though there's definitely a case where some confusion will arise from the duplicate Application Passwords sections in the User Profile.

[jeffpaul]

As @geertvdheide1 notes, we'll likely want to update our docs at https://github.com/10up/distributor#setup-external-connections-using-application-passwords to reference this will only be necessary on WP versions before 5.6 as from 5.6 onwards Application Passwords will come bundled with WP core.

[jeffpaul]

Noting that when trying to use the Application Passwords section Revoke button, that only the first section works to actually revoke while the second instance of the section does nothing upon clicking the Revoke button.

[jeffpaul]

Noting that I still need to test Pulling content and creating a new External Connection.

[dinhtungdu]

Auth Wizard is not working with Application Password in core. A fix is in progress.