Refactored json storage

lib/repositories/metadata/models/account.dart

@@ -0,0 +1,31 @@
+import 'dart:ui';
+
+class Account {
+  String label;
+  String color;
+  bool saving;
+
+  Account({
+    this.label = '',
+    this.color = '',
+    this.saving = false,
+  });
+
+  factory Account.fromJson(Map<String, dynamic> json) {
+    return Account(
+      label: json['label'],
+      color: json['color'],
+      saving: bool.parse(json['saving']),
+    );
+  }
+
+  Map<String, String> toJson() => {
+    'label': label,
+    'color': color,
+    'saving': saving.toString(),
+  };
+
+  Color rgbToColor() {
+    return Color(int.parse(color.toUpperCase().replaceAll("#", ""), radix: 16));
+  }
+}