Creating a Secret from a directory is similar to creating from a file, using the same command, but with directory. Kubernetes will iterate all the files inside that directory and create a Secret for you:

// show directory structure
# tree
.
├── 2-7-1_access-token-dir
│ └── 2-7-1_access-token

// create Secrets from a directory
# kubectl create secret generic access-token --from-file 2-7-1_access-token-dir/
secret "access-token" created

You can check the Secret with the kubectl get secret access-token -o yaml command again and see if they're identical to the ones from the file.