code: def group_required(self, group):
          
  
          def decorator(view):
              @functools.wraps(view)
              def decorated(*args, **kwargs):
                  log.info("Trying to get access to resource: %s protected by group: %s", view.__name__, group)
                  if request.method == 'POST':
                      token = request.form['token']
                      if self.development or self.group_authenticated(token, group):
                          return view(*args, **kwargs)
                      else:
                          log.warning("User has not been authorized to get access to resource: %s", view.__name__)
                  else:
                      log.error("Bad request type! Expected 'POST', actual '%s'", request.method)
  
                  return abort(403)
  
              return decorated
          return decorator
docs: Decorator which checks if user is in group
  
          Decorator for Flask's view which blocks requests from not
          authenticated users or if user is not member of specified group
  
          :param group: group's name