Disclaimer: This is a weekend-project/work-in-progress.
Configuring LDAP can be a daunting task, this is a drop-in LDAP management tool (and server) I built to easily add / remove users from my LDAP directory.
I've tested it with Gitlab, Redmine, Apache mod_authz and OwnCloud/NextCloud with great success. It will most likely work for any basic auth you may require.
Credit for UI goes to @creativetimofficial on github.