Allow rebuild action to take user-data and user-data-file

Is it possible to have the --user-data and --user-data-file flag work with Droplet rebuild actions
For example instead of running this command:
`doctl compute droplet action rebuild `
We can have:
`doctl compute droplet action rebuild --user-data-file='/path/to/user-data.yaml'`

I don't know if this is due to a limitation of doctl or the API itself, but it would be a really nice feature to have.

Please let me know if there's already something similiar in the command line tool, or if there's a beta version with the functionality.