progress in calendar sync

refilc/lib/models/linked_account.dart

@@ -0,0 +1,35 @@
+enum AccountType {
+  apple,
+  google,
+  meta,
+  qwid,
+}
+
+class LinkedAccount {
+  AccountType type;
+  String username;
+  String displayName;
+  String id;
+
+  LinkedAccount({
+    required this.type,
+    required this.username,
+    required this.displayName,
+    required this.id,
+  });
+
+  factory LinkedAccount.fromJson(Map json) {
+    return LinkedAccount(
+      type: json['type'] == 'apple'
+          ? AccountType.apple
+          : json['type'] == 'google'
+              ? AccountType.google
+              : json['type'] == 'meta'
+                  ? AccountType.meta
+                  : AccountType.qwid,
+      username: json['username'],
+      displayName: json['display_name'],
+      id: json['id'],
+    );
+  }
+}