What do you mean by "Your authenticator is registered as a Plugin
in a PAU in your current site"? I registered the authenticator as a
utility and assigned the utility name to the authenticatorPlugins
attribute of the PAU. Is it enough?
I'm not sure I follow you here. Normally when you create a custom
authenticator you first go into Manage Site add a Pluggable Auth
Utility (PAU). Then from within the PAU there are plugins. You can
add your custom plugin here. Then you select a credentials plugin
and your authenticator plugin. I'm not an expert by any means on
PAU, but it seems this is the preferred approach.
The authenticators I've written implemented the following:
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