createPermission method
Create a permission to a specific resource.
Throws a http.ClientException if there were problems communicating with
the API service. Throws a ServiceException if the API method failed for
any reason.
Implementation
Future<Permission> createPermission(CreatePermissionRequest request) async {
final url = Uri.https(_host, '/v1beta/${request.parent}/permissions');
final response = await _client.post(url, body: request.permission);
return Permission.fromJson(response);
}