CKA - Certificate API

Hi, I have created the csr file as per the instructions but cannot see csr file when run kubectl get csr. I have verified the file with the sample file which is given in hint. All configuration is correct. Am i missing the step to get the csr file in the list?

master $ kubectl certificate approve akshay
No resources found
Error from server (NotFound): certificatesigningrequests.certificates.k8s.io “akshay” not found