Custom fields to vendor settings page

add_action('wcvendors_settings_after_paypal', 'pv_add_custom_merchant_id_field');

function pv_add_custom_merchant_id_field() {

    ?>

    <div class="pv_merchant_id_container">

      <p><b><?php _e( 'Merchant ID', 'wc_product_vendor' ); ?></b><br/>

        <?php _e( 'Your Checkout.fi merchant ID.', 'wc_product_vendor' ); ?><br/>

        <input type="text" name="wcv_custom_settings_pv_merchant_id" id="wcv_custom_settings_pv_merchant_id" placeholder="1234" value="<?php echo get_user_meta( get_current_user_id(), 'wcv_custom_settings_pv_merchant_id', true ); ?>" />

      </p>

    </div>

    <?php

  }

add_action( 'wcvendors_admin_after_commission_due', 'pv_admin_user_info' );

function pv_admin_user_info( $user ) {

?>

  <tr>

    <th><label for="wcv_custom_settings_pv_merchant_id"><?php _e( 'Merchant ID', 'wc_product_vendor' ); ?></label></th>

    <td><input type="text" name="wcv_custom_settings_pv_merchant_id" id="wcv_custom_settings_pv_merchant_id" value="<?php echo get_user_meta( $user->ID, 'wcv_custom_settings_pv_merchant_id', true ); ?>" class="regular-text"></td>

  </tr>

<?php

}

add_action( 'wcvendors_shop_settings_saved', 'pv_save_merchant_id' );

add_action( 'wcvendors_update_admin_user', 'pv_save_merchant_id' );

function pv_save_merchant_id( $user_id )

{

  if ( isset( $_POST['wcv_custom_settings_pv_merchant_id'] ) ) {

    update_user_meta( $user_id, 'wcv_custom_settings_pv_merchant_id', $_POST['wcv_custom_settings_pv_merchant_id'] );

  }

}