Fix Zanzana Error "user field is malformed" (#107227)

Fix Authentication: Add UID field to Identity in render service

pkg/services/authn/clients/render.go

@@ -47,6 +47,7 @@ func (c *Render) Authenticate(ctx context.Context, r *authn.Request) (*authn.Ide
 		}
 		return &authn.Identity{
 			ID:              "0",
+			UID:             "0",
 			Type:            identityType,
 			OrgID:           renderUsr.OrgID,
 			OrgRoles:        map[int64]org.RoleType{renderUsr.OrgID: org.RoleType(renderUsr.OrgRole)},

pkg/services/authn/clients/render_test.go

@@ -38,6 +38,7 @@ func TestRender_Authenticate(t *testing.T) {
 			},
 			expectedIdentity: &authn.Identity{
 				ID:              "0",
+				UID:             "0",
 				Type:            claims.TypeAnonymous,
 				OrgID:           1,
 				OrgRoles:        map[int64]org.RoleType{1: org.RoleViewer},
@@ -60,6 +61,7 @@ func TestRender_Authenticate(t *testing.T) {
 			},
 			expectedIdentity: &authn.Identity{
 				ID:              "0",
+				UID:             "0",
 				Type:            claims.TypeRenderService,
 				OrgID:           1,
 				OrgRoles:        map[int64]org.RoleType{1: org.RoleAdmin},