ACF Save action hook to grab that email from member profile and update the user_email

user_email.php

/**
 * ACF
 *
 * Save action hook to grab that email from member profile and update the user_email
 */
function my_acf_save_post( $post_id ) {
		// bail early if no ACF data
		if( empty($_POST['acf']) ) {
			return;
		}

		// bail early if editing in admin
		if( is_admin() ) {
			return;
		}

		if( $_POST['post_id'] != 'new' ) {


		$emailField = $_POST['acf']['profile_email_address'];
			$wp_user_id = str_replace("user_", "", $post_id);

			if (isset($emailField)) {
				if (email_exists( $emailField )){
					// Email exists, do not update value.
					// Maybe output a warning.
					update_field('profile_email_address', get_the_author_meta('user_email',$wp_user_id), $post_id);
				} else {
					$args = array(
						'ID'         => $wp_user_id,
						'user_email' => esc_attr( $emailField )
					);
					wp_update_user( $args );
				}
			}

		}

		// return the ID
		return $post_id;
	}
	add_action('acf/save_post', 'my_acf_save_post', 20);