$post = array(
            'post_title'=>$_POST['firstname'] . $_POST['lastname'],
            'post_type'=>'registration',
            'post_content'=>'',
            'post_status'   => 'publish',
            );
$registration_id = wp_insert_post();
update_post_meta($registration_id, 'email', $_POST['email']);
//wp_publish_post($registration_id);

add_action( 'show_user_profile', 'my_show_extra_profile_fields' );
add_action( 'edit_user_profile', 'my_show_extra_profile_fields' );

function my_show_extra_profile_fields( $user ) { ?>

  <h3>Extra profile information</h3>

  <table class="form-table">

    <tr>
      <th><label for="abn">ABN</label></th>

      <td>
        <input type="text" name="abn" id="abn" value="<?php echo esc_attr( get_the_author_meta( 'abn', $user->ID ) ); ?>" class="regular-text" /><br />
        <span class="description">Please enter your abn num.</span>
      </td>
    </tr>
    <tr>
      <th><label for="abn">Business Name</label></th>

      <td>
        <input type="text" name="BusinessName" id="BusinessName" value="<?php echo esc_attr( get_the_author_meta( 'BusinessName', $user->ID ) ); ?>" class="regular-text" /><br />
        <span class="description">Please enter your Business Name.</span>
      </td>
    </tr>
    <tr>
      <th><label for="abn">Business type</label></th>

      <td>
        <input type="text" name="Businesstype" id="Businesstype" value="<?php echo esc_attr( get_the_author_meta( 'Businesstype', $user->ID ) ); ?>" class="regular-text" /><br />
        <span class="description">Please enter your Business type.</span>
      </td>
    </tr>
  </table>
<?php }

add_action( 'personal_options_update', 'my_save_extra_profile_fields' );
add_action( 'edit_user_profile_update', 'my_save_extra_profile_fields' );

function my_save_extra_profile_fields( $user_id ) {

  if ( !current_user_can( 'edit_user', $user_id ) )
    return false;

  /* Copy and paste this line for additional fields. Make sure to change 'twitter' to the field ID. */
  update_usermeta( $user_id, 'abn', $_POST['abn'] );
  update_usermeta( $user_id, 'BusinessName', $_POST['BusinessName'] );
  update_usermeta( $user_id, 'Businesstype', $_POST['Businesstype'] );
}

//add bulk action in registration post types
add_filter('manage_edit-product_columns', 'my_extra_cake_columns');
function my_extra_cake_columns($columns) {
    $columns['slices'] =__('Create User');
    return $columns;
}


    add_action( 'personal_options_update', 'my_save_extra_profile_fields' );
    add_action( 'edit_user_profile_update', 'my_save_extra_profile_fields' );

    function my_save_extra_profile_fields( $user_id ) {

      if ( !current_user_can( 'edit_user', $user_id ) )
        return false;

      /* Copy and paste this line for additional fields. */
      update_usermeta( $user_id, 'abn', $_POST['abn'] );
      update_usermeta( $user_id, 'BusinessName', $_POST['BusinessName'] );
      update_usermeta( $user_id, 'Businesstype', $_POST['Businesstype'] );
    }

add_action( 'manage_product_posts_custom_column', 'my_cake_column_content', 10, 2 );
function my_cake_column_content( $column_name, $post_id ) {
    if ( 'slices' != $column_name )
        return;
    echo '<a href="#">Add as user</a>';
}

add_filter( 'manage_edit-product_sortable_columns', 'my_sortable_cake_column' );
function my_sortable_cake_column( $columns ) {
    $columns['slices'] = 'slice';
    return $columns;
}

//How to Create User
$fname = get_post_meta($post_id,'firstname',true);
$lname = get_post_meta($post_id,'lastname',true);
$email_address = get_post_meta($post_id,'email',true);
$password = rand(); //create random password
$user_id = wp_create_user( $email_address, $password, $email_address );
          // Set the nickname
          wp_update_user(
            array(
              'ID'          =>    $user_id,
              'nickname'    =>    $email_address,
              'first_name'  =>    $fname,
              'last_name'   =>    $lname
            )
          );

          // Set the role
          $user = new WP_User( $user_id );

//delete that post
wp_delete_post( $post_id );
// Email the user
wp_mail( $email_address, 'Welcome!', 'Your Password: ' . $password );