readAtsigns method
Function to get all atsign item in keychain
Implementation
Future<List<AtsignKey>> readAtsigns() async {
final atClientData = await readAtClientData(useSharedStorage: false);
final useSharedStorage = atClientData?.config?.useSharedStorage ?? false;
final data = await readAtClientData(useSharedStorage: useSharedStorage);
return data?.keys ?? [];
}