Identify the error in this role-based guard implementation:

Identify the error in this role-based guard implementation:

canActivate(context: ExecutionContext) {
  const roles = this.reflector.get('roles', context.getHandler());
  const request = context.switchToHttp().getRequest();
  const user = request.user;
  if (!roles) {
    return false;
  }
  return roles.includes(user.role);
}