backstage/.changeset/giant-nails-grow.md

@backstage/plugin-auth-backend

@backstage/plugin-auth-backend
minor

• Moved IdentityClient, BackstageSignInResult, BackstageIdentityResponse, and BackstageUserIdentity to @backstage/plugin-auth-node.

While moving over, IdentityClient was also changed in the following ways:

• Made IdentityClient.listPublicKeys private. It was only used in tests, and should not be part of the API surface of that class.
• Removed the static IdentityClient.getBearerToken. It is now replaced by getBearerTokenFromAuthorizationHeader from @backstage/plugin-auth-node.

Since the IdentityClient interface is marked as experimental, this is a breaking change without a deprecation period.