SAML documentation updates #4109
Description
https://fusionauth.io/docs/apis/identity-providers/samlv2
identityProvider.usernameClaim
The name of the claim in the SAML response that FusionAuth uses to identity the username. If this is not set, the NameId value will be used to link a user. This property is required when identityProvider.linkingStrategy is set to LinkByUsername or LinkByUsernameForExistingUser
If this [username claim pointer] is not set, the NameId value will be used to link a user.
This is not accurate ☝🏻 . A claim for username needs to be sent over as an additional attribute for username.