unable to text JWT authorization using Postman

I am testing 'JWT authorization flow' but getting error
"errorCode": "OAU-250",

"message": "Unsupported grant type"

I don't want to use SDK as I will deploy on MS-SQL Server.

Community Manager

Can you double check the grant type of your app to see if it is JWT auth flow? Or let me know the app client id.

Author

The First Step

tried on Powershell too

App client Id: avDmFoV208obAVOTmKzqMu

Auth flow is JWT only

Author

The First Step

So working Powersell Code to get the access token using JWT is

DO NOT pass 'body' as below

Author

The First Step

same for Postman looks like

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