check if env (environment variable) for the secret is properly assigned.
$ kubectl logs env-pod
Username: jsmith Password: mysecretpassword

check if volume for the secret is properly mounted.
$ kubectl exec volume-pod -- ls /etc/config/secret
password
username
$ kubectl exec volume-pod -- cat /etc/config/secret/username
jsmith
$ kubectl exec volume-pod -- cat /etc/config/secret/password
mysecretpassword
