Yes, there are ways to invoke CLI commands from the DataOntap Powershell Module.
Here is an example command that I have for setting up public keys. It uses the 'Invoke-NcSsh' posh commandlet:
Connect-WfaCluster $Cluster
Get-WFALogger -Info -message $("Setting up publickey for user '" + $username + "' on Vserver " + $Vserver)
$Cmd = "security login publickey create -vserver $Vserver -user $Username -publickey ""$SshKey""";
Get-WFALogger -Info -message $("Running: " + $Cmd)
$retVal = Invoke-NcSsh -Command $Cmd
Get-WFALogger -Info -message $retVal
Note: I'm not sure whether I created this one, or just copied someone else. 😉