# Base URL of TeamForge site.
       site_url="https://teamforge.example.com"

       # TeamForge authentication credentials.
       username="foo"
       password="bar"

       # Requested scope (all)
       scope="urn:ctf:services:ctf urn:ctf:services:svn urn:ctf:services:gerrit urn:ctf:services:soap60"

       curl -d "grant_type=password&client_id=api-client&scope=$scope&username=$username&password=$password" $site_url/oauth/auth/token

$site="https://my.teamforge.site"
$user="myuser"
$pass="mypass"
$scope="urn:ctf:services:ctf"
curl "grant_type=password&client_id=api-client&scope=$scope&username=$user&password=$pass" -uri $site/oauth/auth/token

Invoke-WebRequest : A positional parameter cannot be found that accepts argument
'grant_type=password&client_id=api-client&scope=urn:ctf:services:ctf&username= *rest of line redacted for obvious reasons*