get benchmarking ot compile

frame/identity/src/benchmarking.rs

@@ -24,6 +24,7 @@ use super::*;
 use frame_system::{EventRecord, RawOrigin};
 use frame_benchmarking::{benchmarks, account, whitelisted_caller, impl_benchmark_test_suite};
 use sp_runtime::traits::Bounded;
+frame_support::ensure!;
 
 use crate::Pallet as Identity;