Rewired login confirmation

frontend/pshared/lib/models/confirmation_target.dart

@@ -0,0 +1,11 @@
+import 'package:json_annotation/json_annotation.dart';
+
+
+/// Targets for confirmation codes.
+@JsonEnum(alwaysCreate: true)
+enum ConfirmationTarget {
+  @JsonValue('login')
+  login,
+  @JsonValue('payout')
+  payout,
+}

frontend/pshared/lib/models/session_identifier.dart

@@ -1,8 +1,3 @@
-import 'package:json_annotation/json_annotation.dart';
-
-part 'session_identifier.g.dart';
-
-@JsonSerializable()
 class SessionIdentifier {
   final String clientId;
   final String deviceId;
@@ -11,8 +6,4 @@ class SessionIdentifier {
     required this.clientId,
     required this.deviceId,
   });
-
-  factory SessionIdentifier.fromJson(Map<String, dynamic> json) => _$SessionIdentifierFromJson(json);
-
-  Map<String, dynamic> toJson() => _$SessionIdentifierToJson(this);
 }