function AddUserToGroup($user, $group)
{
    $uri = "https://forums2.example.com/groups/" + $group + "/members.json?api_key=key&api_username=username"
    $body = "name" + $group + "username=" + $user

    Invoke-WebRequest -Headers @{} -Method PUT `
                  -Body $body -Uri $uri  `
                  -ContentType application/x-www-form-urlencoded