Coinspot API with PowerShell - powershell

Question

I'm struggling to access the Coinspot API from PowerShell. No matter what I do I always get the "no nonce" error back from the API:
$VerbosePreference = 'Continue'
$key = ''
$secret = ''
$epoc_start_date = ("01/01/1970" -as [DateTime])
[int]$nonce = ((New-TimeSpan -Start $epoc_start_date -End ([DateTime]::UtcNow)).TotalSeconds -as [string])
$baseUrl = 'www.coinspot.com.au/api'
$resourcePath = '/my/orders'
$url = 'https://{0}{1}&nonce={2}' -f $baseUrl, $resourcePath, $nonce
$encoded = New-Object System.Text.UTF8Encoding
$url_bytes = $encoded.GetBytes($url)
# create hash
$hmac = New-Object System.Security.Cryptography.HMACSHA512
$hmac.key = [Text.Encoding]::ASCII.GetBytes($secret)
$sha_result = $hmac.ComputeHash($url_bytes)
#remove dashes
$hmac_signed = [System.BitConverter]::ToString($sha_result) -replace "-";
$headers = #{
sign = $hmac_signed
key = $key
'content-type' = 'application/json'
}
$result = Invoke-RestMethod -Uri $url -Method Post -Headers $headers
$result
Alternatively I have already tested this:
$VerbosePreference = 'Continue'
$key = ''
$secret = ''
$epoc_start_date = ("01/01/1970" -as [DateTime])
[int]$nonce = ((New-TimeSpan -Start $epoc_start_date -End ([DateTime]::UtcNow)).TotalSeconds -as [string])
$baseUrl = 'www.coinspot.com.au/api'
$resourcePath = '/my/orders'
$url = 'https://{0}{1}' -f $baseUrl, $resourcePath
$body = #{
nonce = $nonce
}
$encoded = New-Object System.Text.UTF8Encoding
$body_bytes = $encoded.GetBytes($body)
# create hash
$hmac = New-Object System.Security.Cryptography.HMACSHA512
$hmac.key = [Text.Encoding]::ASCII.GetBytes($secret)
$sha_result = $hmac.ComputeHash($body_bytes)
#remove dashes
$hmac_signed = [System.BitConverter]::ToString($sha_result) -replace "-";
Invoke-RestMethod -Uri $url -Method Post -Headers #{sign = $hmac_signed ; key = $key ; 'content-type' = 'application/json' } -Body $($body | ConvertTo-Json)
The second gives me an invalid status error.
I have a feeling there's something wrong with my header.

Answer 1

Coinspot support responded:
Apologies for this.
Our current API system is way out of date and needs to be updated.
We know that we need to support the developers as best as we can but our current dev team are very busy with other things at the
moment.
They are aware of this and plan to update it as soon as possible, but right now there is no ETA for this.
Very sorry the inconvenience.