User-friendly federated login
To login using a federated provider, I currently see this:
Unfortunately login with email isn't possible, because we can't guarantee that the email provider is the same as the OIDC provider, and we discover the OIDC provider using the input to this field (user@oidcproviderurl)
I think a lot of users won't know what a webfinger-id is, or what an OIDC provider is. An example could be added statically to this form ("e.g. yourusername@yourprovider.com")
Maybe we could also support a new setting which could be used to provide an optional context-specific example, e.g. WEBFINGERID_EXAMPLE='yourusername@happy-dev.fr'
@rachel what do you think?