Fix return type of clients.findRole() in @keycloak/keycloak-admin-client (#27429) (#30882)

Closes #27444

Signed-off-by: Simon Hanna <simon.hanna@aeb.com>
(cherry picked from commit 401e1bd636)

Co-authored-by: Simon Hanna <33220646+simhnna@users.noreply.github.com>

js/apps/admin-ui/src/clients/roles/CreateClientRole.tsx

@@ -34,10 +34,10 @@ export default function CreateClientRole() {
         ...role,
       });
 
-      const createdRole = await adminClient.clients.findRole({
+      const createdRole = (await adminClient.clients.findRole({
         id: clientId!,
         roleName: role.name!,
-      });
+      }))!;
 
       addAlert(t("roleCreated"), AlertVariant.success);
       navigate(

js/libs/keycloak-admin-client/src/resources/clients.ts

@@ -113,7 +113,7 @@ export class Clients extends Resource<{ realm?: string }> {
 
   public findRole = this.makeRequest<
     { id: string; roleName: string },
-    RoleRepresentation
+    RoleRepresentation | null
   >({
     method: "GET",
     path: "/{id}/roles/{roleName}",