No available subscription pools were found matching the expression "Red Hat Virtualization"

Hi I am trying to access the Red hat virtualization repo as mentioned the guide https://access.redhat.com/documentation/en-us/red_hat_virtualization/4.3/html-single/installing_red_hat_virtualization_as_a_self-hosted_engine_using_the_command_line/index#Enabling_the_Red_Hat_Enterprise_Linux_Host_Repositories_SHE_deployment_host.

So when i execute the command to register my red hat enterprise linux virtual machine ( a virtual machine running on openstack) with the subscription redhat virtualization i am returned with no subscriptions pools were found. As a result when i run "subscription-manager repos --enable=rhel-7-server-rhev-4-mgmt-agent-rpms" as in the documentation iam returned with an error saying repo wasnt found. Can anyone help with this?