Error while enabling repo in microdnf

I am using "registry.access.redhat.com/rhel7-minimal" within a docker container and while trying to install the "unzip"package using microdnf :

microdnf --enablerepo=rhel-7-server-rpms install unzip shadow-utils --nodocs

I am getting an error like so:
(microdnf:8): libdnf-WARNING **: 05:36:59.755: Skipping refresh of rhel-7-server-rpms: cannot update repo 'rhel-7-server-rpms': Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried; Last error: Status code: 403 for https://cdn.redhat.com/content/dist/rhel/server/7/7Server/x86_64/os/repodata/repomd.xml
11:06:59
error: No package matches 'unzip'

I couldnt find any solutions for this so please help out