Change how authors are retrieved for the author widget/block

includes/widgets/fields/author-user.php

@@ -0,0 +1,18 @@
+<?php
+
+$users   = get_users(
+	array(
+		'who' => 'authors',
+	)
+);
+$options = array();
+foreach ( $users as $user ) {
+	$options[ $user->ID ] = $user->data->display_name;
+}
+
+return array(
+	'id'      => 'user',
+	'label'   => __( 'Select a user. The email address for this account will be used to pull the Gravatar image.', 'display-featured-image-genesis' ),
+	'flex'    => true,
+	'choices' => $options,
+);