Kubernetes supports creating a Secret with a single command line, as well:

// create a Secret via plain text in command line
# kubectl create secret generic access-token --from-literal=2-7-1_access-token=9S!g0U61699r
secret "access-token" created

Then we can use the get secret command to check if they're identical to the previous method:

// check the details of a Secret
# kubectl get secret access-token -o yaml
apiVersion: v1
data:
  2-7-1_access-token: OVMhZzBVNjE2OTlyCg==
kind: Secret
metadata:
  creationTimestamp: 2018-01-01T21:44:32Z
  name: access-token
  ...
type: Opaque