Doesn't save data to Sleeping Owl database?

Question

Laravel

admin/User.php

<?php

Admin::model(App\User::class)->title('')->with()->filters(function ()
{

})->columns(function ()
{
    Column::string('id', 'id');
    Column::string('name', 'Имя');
    Column::string('email', 'Email');
    Column::string('role', 'роль');
})->form(function ()
{
  FormItem::text('name', 'Name');
  FormItem::text('role', 'Role');
  FormItem::text('email', 'Email');
  FormItem::password('password', 'Password');
  FormItem::text('remember_token', 'Remember Token')->attributes(['class' => 'hidden']);
});

When I edit a record, everything is saved except for the role field, although it is present in the database table. What could be the problem ? and how to store password in md5 format?