Move this module to the getting started section: https://docs.openshift.com/container-platform/4.7/cicd/gitops/configuring_argo_cd_to_recursively_sync_a_git_repository_with_your_application/configuring-an-openshift-cluster-by-deploying-an-application-with-cluster-configurations.html#logging-in-to-the-argo-cd-instance-by-using-your-openshift-credentials_configuring-an-openshift-cluster-by-deploying-an-application-with-cluster-configurations

This makes sense as without that a user can not realistically start using GitOps also the introduction in the Installation says: 
This guide explains how to install the Red Hat OpenShift GitOps Operator to an OpenShift Container Platform cluster and logging in to the Argo CD instance.

In the configuring section: https://docs.openshift.com/container-platform/4.7/cicd/gitops/configuring_argo_cd_to_recursively_sync_a_git_repository_with_your_application/configuring-an-openshift-cluster-by-deploying-an-application-with-cluster-configurations.html add 'logged into ArgoCD instance' as a prerequisite.