Teams for WooCommerce Memberships - Make Team Name a required field

/**
 * Make the Team Name field on the product page Required
 * Requires Teams 1.0.2
 *
 * @param array $fields the product page fields
 * @param \WC_Product $product current product, unused
 * @return array updated fields
 */

add_filter( 'wc_memberships_for_teams_product_team_user_input_fields', function( $fields, $product ) {
	if ( isset( $fields['team_name'] ) ) {
		$fields['team_name']['custom_attributes'] = array( 'required' => 'required' );
	}
	return $fields;
}, 10, 2 );