I'm trying to add a DNS entry using the API call https://api.dynu.com/v2/dns. I'm doing this from a powershell with the following code:

$Form = @{
name = 'qwikfoto3.ddnsfree.com'
group = ''
ipv4Address = $myip
ipv6Address = ''
ttl = '90'
ipv4 = $true
ipv6 = $false
ipv4WildcardAlias = $true
ipv6WildcardAlias = $false
allowZoneTransfer = $false
dnssec = $false
}
$Response = Invoke-WebRequest -Headers $headers -Uri https://api.dynu.com/v2/dns -Body $Form -Method Post -UseBasicParsing

A 501 Argument Exception suggests that there's something wrong with one of the arguments that I'm passing.

Can anyone find the problem here?

Thanks,