Round 2 of nullable checks

ArchiSteamFarm/IPC/Requests/TwoFactorAuthenticationConfirmationsRequest.cs

@@ -19,6 +19,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+using System;
 using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Diagnostics.CodeAnalysis;
@@ -59,9 +60,7 @@ namespace ArchiSteamFarm.IPC.Requests {
 		public ImmutableHashSet<string> SAcceptedCreatorIDs {
 			set {
 				if (value == null) {
-					ASF.ArchiLogger.LogNullError(nameof(value));
-
-					return;
+					throw new ArgumentNullException(nameof(value));
 				}
 
 				HashSet<ulong> acceptedCreatorIDs = new HashSet<ulong>(value.Count);