+signup +email availability check

frontend/pshared/lib/api/requests/signup.dart

@@ -5,20 +5,20 @@ part 'signup.g.dart';
 
 @JsonSerializable(explicitToJson: true)
 class SignupRequest {
-  final String name;
-  final String login;
-  final String password;
-  final String locale;
-  final String organizationName;
+  final SignupAccount account;
+  final DescribableRequest organization;
   final String organizationTimeZone;
+  final DescribableRequest anonymousUser;
+  final DescribableRequest ownerRole;
+  final DescribableRequest anonymousRole;
 
   const SignupRequest({
-    required this.name,
-    required this.login,
-    required this.password,
-    required this.locale,
-    required this.organizationName,
+    required this.account,
+    required this.organization,
     required this.organizationTimeZone,
+    required this.anonymousUser,
+    required this.ownerRole,
+    required this.anonymousRole,
   });
 
   factory SignupRequest.build({
@@ -28,15 +28,55 @@ class SignupRequest {
     required String locale,
     required String organizationName,
     required String organizationTimeZone,
-  }) => SignupRequest(
-    name: name, 
-    login: login, 
-    password: password, 
-    locale: locale, 
-    organizationName: organizationName, 
-    organizationTimeZone: organizationTimeZone, 
-  );
+  }) =>
+      SignupRequest(
+        account: SignupAccount(
+          name: name,
+          login: login,
+          password: password,
+          locale: locale,
+        ),
+        organization: DescribableRequest(name: organizationName),
+        organizationTimeZone: organizationTimeZone,
+        anonymousUser: const DescribableRequest(name: 'Anonymous'),
+        ownerRole: const DescribableRequest(name: 'Owner'),
+        anonymousRole: const DescribableRequest(name: 'Anonymous'),
+      );
 
-  factory SignupRequest.fromJson(Map<String, dynamic> json) => _$SignupRequestFromJson(json);
+  factory SignupRequest.fromJson(Map<String, dynamic> json) =>
+      _$SignupRequestFromJson(json);
   Map<String, dynamic> toJson() => _$SignupRequestToJson(this);
 }
+
+@JsonSerializable()
+class SignupAccount {
+  final String name;
+  final String login;
+  final String password;
+  final String locale;
+  final String? description;
+
+  const SignupAccount({
+    required this.name,
+    required this.login,
+    required this.password,
+    required this.locale,
+    this.description,
+  });
+
+  factory SignupAccount.fromJson(Map<String, dynamic> json) =>
+      _$SignupAccountFromJson(json);
+  Map<String, dynamic> toJson() => _$SignupAccountToJson(this);
+}
+
+@JsonSerializable()
+class DescribableRequest {
+  final String name;
+  final String? description;
+
+  const DescribableRequest({required this.name, this.description});
+
+  factory DescribableRequest.fromJson(Map<String, dynamic> json) =>
+      _$DescribableRequestFromJson(json);
+  Map<String, dynamic> toJson() => _$DescribableRequestToJson(this);
+}