Unsupported Input Received with Status Code 415 (Unsupported Media Type)

Hi, I am trying to calling https://api.mollie.com/v2/payments url from my backend by using httpClient.PostAsync.

So, initially it was responding me "Could not create SSL/TLS secure channel" error so then I followed this https://github.com/AuthorizeNet/sdk-dotnet/issues/203 and after adding the suggested 3 lines of code right before calling post method of httpClient and then its responding "Unsupported Input Received" with 415 status code.

// Code sample

public class MollieHelper
    {
        private readonly HttpClient httpClient = new HttpClient();
        public MollieHelper(string accessToken)
        {
            this.httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("bearer", accessToken);
            this.httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
        }

        public async Task<object> PostAsync(string url, object obj)
        {
            // Suggested code from https://github.com/AuthorizeNet/sdk-dotnet/issues/203
            const SslProtocols sslProtocols = (SslProtocols)0x00000C00;
            const SecurityProtocolType securityProtocolType = (SecurityProtocolType)sslProtocols;
            ServicePointManager.SecurityProtocol = securityProtocolType;

            var response = await this.httpClient.PostAsync(new Uri(url), new StringContent(JsonConvert.SerializeObject(obj)));
            if (!response.IsSuccessStatusCode)
            {
                return null;
            }
            var result = await response.Content.ReadAsStringAsync();
            var data = JsonConvert.DeserializeObject(result);
            return data;
        }
    }

and I am sending data like { "amount": { "currency": "EUR", "value": "30" }, "description": "Please select the payment method", "redirectUrl": "https://mydomain.com" }

Viincenttt / MollieApi

Unsupported Input Received with Status Code 415 (Unsupported Media Type) #256