WP User Manager - Resize avatar uploads to a specific size

wpum_resize_avatars.php

<?php

add_filter( 'wpum_upload_file_pre_upload', 'wpum_resize_avatar_images', 10, 2 );
function wpum_resize_avatar_images( $file, $args ) {
	if ( ! isset( $args['file_key'] ) || 'user_avatar' !== $args['file_key'] ) {
		return $file;
	}

	$editor = wp_get_image_editor( $file['tmp_name'] );
	if ( is_wp_error( $editor ) ) {
		return $file;
	}

	$editor->set_quality( 90 );
	$editor->resize( 100, 100 ); // (int) max width, (int) max height[, (bool) crop]
	$tmp_file  = $file['tmp_name'];
	$file_data = $editor->save( $tmp_file );

	rename( $file_data['path'], $tmp_file );

	return $file;
}

Alter line 15 to change the dimensions