insert method
      
Future<EntityUserLink> 
insert(
    
- EntityUserLink request,
- String accountId,
- String webPropertyId, {
- String? $fields,
Adds a new user to the given web property.
request - The metadata request object.
Request parameters:
accountId - Account ID to create the user link for.
webPropertyId - Web Property ID to create the user link for.
$fields - Selector specifying which fields to include in a partial
response.
Completes with a EntityUserLink.
Completes with a commons.ApiRequestError if the API endpoint returned an error.
If the used http.Client completes with an error when making a REST call,
this method will complete with the same error.
Implementation
async.Future<EntityUserLink> insert(
  EntityUserLink request,
  core.String accountId,
  core.String webPropertyId, {
  core.String? $fields,
}) async {
  final body_ = convert.json.encode(request);
  final queryParams_ = <core.String, core.List<core.String>>{
    if ($fields != null) 'fields': [$fields],
  };
  final url_ =
      'management/accounts/' +
      commons.escapeVariable('$accountId') +
      '/webproperties/' +
      commons.escapeVariable('$webPropertyId') +
      '/entityUserLinks';
  final response_ = await _requester.request(
    url_,
    'POST',
    body: body_,
    queryParams: queryParams_,
  );
  return EntityUserLink.fromJson(
    response_ as core.Map<core.String, core.dynamic>,
  );
}