Plumber Agents Query

// WP_User_Query arguments
$args = array(
	'fields'         => array( 'user_email' ),
);

// The User Query
$plumber_agents_query = new WP_User_Query( $args );

// The User Loop
if ( ! empty( $plumber_agents_query->results ) ) {
	foreach ( $plumber_agents_query->results as $user ) {
		// do something
	}
} else {
	// no users found
}