fix issue

bin/nexusbot.dart

@@ -1,5 +1,6 @@
 import "dart:io";
 import "package:cli_tools/config.dart";
+import "package:collection/collection.dart";
 import "package:enough_mail/enough_mail.dart" as mail;
 import "package:markdown/markdown.dart";
 import "package:matrix/matrix.dart";
@@ -71,9 +72,11 @@ void main(List<String> argsRaw) async {
 
           final registration = container
               .read(RegistrationController.provider)
-              .firstWhere(
+              .firstWhereOrNull(
                 (account) => account.username == results.namedGroup("username"),
               );
+          if (registration == null) return;
+
           final password = results.namedGroup("password")!;
           final reactionEvent = await event.room.sendReaction(
             event.eventId,

pubspec.lock

@@ -210,7 +210,7 @@ packages:
     source: hosted
     version: "4.10.1"
   collection:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: collection
       sha256: "2f5709ae4d3d59dd8f7cd309b4e023046b57d8a6c82130785d2b0e5868084e76"

pubspec.yaml

@@ -22,6 +22,7 @@ dependencies:
   markdown: ^7.3.0
   matrix: ^1.1.0
   sqflite_common_ffi: ^2.3.6
+  collection: ^1.19.1
 
 dev_dependencies:
   build_runner: ^2.4.6