Apologies, I am perplexed. Has something changed with how API calls are handled in the past year. I had code that was working but now I get the above error. Has there been a URL change or perhaps formatting? I am using "3-legged OAuth flow authorization code" Thanks, Andy
OAU-251 - "Unauthorized for this grant type"
What is your app platform type? Check this old thread to see how to change/fix your issue.
Private windows desktop
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