Auth: use IdentityType from authlib (#91763)

pkg/storage/unified/resource/grpc/authenticator.go

@@ -6,6 +6,7 @@ import (
 	"strconv"
 
 	"github.com/grafana/authlib/authn"
+	"github.com/grafana/authlib/claims"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/metadata"
 
@@ -76,7 +77,7 @@ func (f *Authenticator) decodeMetadata(ctx context.Context, meta metadata.MD) (i
 	// TODO, remove after this has been deployed to unified storage
 	if getter(mdUserID) == "" {
 		var err error
-		user.Type = identity.TypeUser
+		user.Type = claims.TypeUser
 		user.UserID, err = strconv.ParseInt(getter("grafana-userid"), 10, 64)
 		if err != nil {
 			return nil, fmt.Errorf("invalid user id: %w", err)