feat: add endpoint for get branch admin

src/controllers/branch-user-controller.ts

@@ -58,6 +58,23 @@ async function userBranchCodeGen(branch: Branch, user: User[]) {
   );
 }
 
+@Route("api/v1/branch/{branchId}/admin")
+@Tags("Branch User")
+export class BranchAdminUserController extends Controller {
+  @Get()
+  @Security("keycloak")
+  async getBranchAdmin(@Path() branchId: string) {
+    return await prisma.user.findFirst({
+      where: {
+        branch: {
+          some: { branchId },
+        },
+        userRole: "branch_admin",
+      },
+    });
+  }
+}
+
 @Route("api/v1/branch/{branchId}/user")
 @Tags("Branch User")
 export class BranchUserController extends Controller {