Configure (or reconfigure) the external Identity Provider used for
Mailcow login. Pass the attributes for one of the supported
authsource values; the wrapper supplies the required
items: ['identity-provider'] envelope.
The identity-provider attributes to apply.
Interface for the external Identity Provider endpoint.
Mailcow has a single global identity-provider configuration -- there is no add or delete, only edit -- so this group exposes a single method.