Restriction of Usernames with spaces

The plugin’s default validation for WP native fields is essentially WP’s validation.

The plugin does have the ability for you to set up custom form validation. You can do that hooking your custom validation function to the wpmem_pre_register_data action.

https://rocketgeek.com/plugins/wp-members/docs/filter-hooks/wpmem_pre_register_data/

Hello Chad,
I really appreciate you taking your time to respond. keep up the good work

Thanks