add gender or custom field to store-settings and admin for users wc vendors pro

functions.php

/* adds the field to the store-settings form and signup form */
add_action( 'wcvendors_settings_after_shop_description', 'store_gender' );
function store_gender( ){ 
  if ( class_exists( 'WCVendors_Pro' ) ){ 
    $key = '_wcv_custom_settings_gender'; 
    $value = get_user_meta( get_current_user_id(), $key, true ); 
    // Gender
    WCVendors_Pro_Form_Helper::input( array(  
      'id'        => $key, 
      'label'       => __( 'Your Gender', 'wcvendors-pro' ), 
      'placeholder'       => __( 'Are you male or female?', 'wcvendors-pro' ), 
      'desc_tip'      => 'true', 
      'description'       => __( 'Your Gender', 'wcvendors-pro' ), 
      'type'        => 'text', 
      'value'       => $value, 
      )
    );
  } 
}

/* adds field to the admin user screen */
add_action( 'wcvendors_admin_after_shop_name', 'wcv_custom_settings_gender_admin' );
function wcv_custom_settings_gender_admin( $user ) {
?>
  <tr>
    <th><label for="_wcv_custom_settings_gender"><?php _e( 'Gender', 'wcvendors-pro' ); ?></label></th>
    <td><input type="text" name="_wcv_custom_settings_gender" id="_wcv_custom_settings_gender" value="<?php echo get_user_meta( $user->ID, '_wcv_custom_settings_gender', true ); ?>" class="regular-text"></td>
  </tr>
<?php
}