Packaging Private WordPress Plugin for Composer

I’m trying to add composer.json files to my Plugins that are on a private GitLab server.

Here is my composer.json in Bedrock:

Here’s my composer.json in my Plugin:

{ "name": "wppc/wppc-sign-in-site-credits-copyright-terms-conditions", "type": "wordpress-plugin", "require": { "composer/installers": "v1.0.6" } }

I uploaded the Plugin as a .zip to the public folder of my website and then updated the URL in my composer.json file (as you can see). Then ran composer update but am getting “Nothing to install or update.”

Can any of you help me understand what I’ve done wrong? Thank you!