Invoke-RestMethod returns 400 server error.

Question

The objective is to request the access and refresh token from Google API Oauth authorization code. I understand the 400 server error is due to a malformed URL, but I am not able to determine why it is malformed. As you can see, I implemented a 'try' &
'catch' statement on the error exception. The result doesn't provide any more information of why the Invoke-RestMethod will not work. What am I missing? Thanks
$TokenUrl = "https://accounts.google.com/o/oauth2/token"
$body = @{
  code="enter oauth authorization code here"
  client_id="enter google api client id here"
  client_secret="enter google api client secret here"
  redirect_uri="urn:ietf:wg:oauth:2.0:oob"
  grant_type="authorization_code"
Try {
$json = Invoke-RestMethod -Uri $TokenUrl -Method Post -Body $body
Catch {
    Write-Host $_.Exception.ToString()
    $error[0] | Format-List -Force

Answer 1

Hi Gumps,
I’m writing to just check in to see if the suggestions were helpful. If you need further help, please feel free to reply this post directly so we will be notified to follow it up.
If you have any feedback on our support, please click here.
Best Regards,
Anna Wang
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Support, contact [email protected]