WP User Manager Username Length

WP User Manager plugin is required.

This is a free add-on for the WP User Manager plugin. You must download and install the WP User Manager plugin before you can use this addon.
Download WPUM for free here https://wordpress.org/plugins/wp-user-manager/

WPUM Username Length

WPUM Username Length is an add-on for WP User Manager that let’s you define minimum and maximum username length.