$username = "login name"
$password = "your pass"
$secstr = New-Object -TypeName System.Security.SecureString
$password.ToCharArray() | ForEach-Object {$secstr.AppendChar($_)}
$cred = new-object -typename System.Management.Automation.PSCredential -argumentlist $username, $secstr

Connect-PnPOnline -Url https://sp.sharepoint.com/sites/dev/ -Credentials $cred

Get-PnPList | foreach {
    if($_.BaseType -eq "DocumentLibrary"){
        Write-Host $_.Title
    }
}