public async Task <ActionResult> RehashAllPasswords()
        {
            using (UserDefinitionDataProvider userDP = new UserDefinitionDataProvider()) {
                await userDP.RehashAllPasswordsAsync();

                return(Reload(null, Reload: ReloadEnum.ModuleParts, PopupText: this.__ResStr("rehashDone", "All user passwords have been rehashed")));
            }
        }