I am testing 'JWT authorization flow' but getting error
"errorCode": "OAU-250",
"message": "Unsupported grant type"
using : https://platform.devtest.ringcentral.com/restapi/oauth/token


I don't want to use SDK as I will deploy on MS-SQL Server.
I am testing 'JWT authorization flow' but getting error
"errorCode": "OAU-250",
"message": "Unsupported grant type"
using : https://platform.devtest.ringcentral.com/restapi/oauth/token


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