OpenShift WebHook Unauthorized Error

Issue

• I am attempting to use a generic webhook to trigger a build in an OCP project. I am using Gitlab as the SCM tool. I have added the webhook to the project and successfully tested it from the GUI; there is a test button that returns success. When I push code, there is no build triggered in the project. I read [0] and tried using curl with a POST request command but I receive "Unauthorized".
• I haven't been able to trigger build
• I am using the appropriate url: https://<openshift_api_host:port>/oapi/v1/namespaces/<namespace>/buildconfigs/<name>/webhooks/<secret>/generic and still having issues with the webhook
• I followed this other Knowledge Base Solution and am now seeing an Unauthorized error message