insert method
Adds a subscription for the authenticated user's channel.
Implementation
Future<Subscription> insert({
String part = 'contentDetails,id,snippet,subscriberSnippet',
List<String> partList = const [],
required Map<String, dynamic> body,
String? onBehalfOfContentOwner,
String? onBehalfOfContentOwnerChannel,
}) async {
return await _rest.insert(
// _authHeader,
accept,
contentType,
buildParts(partList, part),
body,
);
}