Category "flurl"

Unsupported grant type exception on Flurl POST

I am making a POST to a client authentication endpoint with an encoded auth header and I receive Unsupported grant type exception. Speaking with the client, the

HTTP Request works in Postman, but not in C# code

I want to do a simple HTTP request in C#, but something is not working and all I got is 403 Forbidden status code. When I try to do same request in Postman, ev