Get a FedEx Bearer Token

This C# program demonstrates how to retrieve a bearer token from the FedEx API, using credentials. If the credentials are good, the output should be similar to the first output. If not, it will look like the second output.

Program.cs

using System;
using System.Collections.Generic;
using System.Net.Http;
using System.Threading.Tasks;

namespace GetFedExBearerToken
{
    internal class Program
    {
        static void Main(string[] args)
        {
            HttpClient client = new HttpClient();
            List<KeyValuePair<string, string>> postData = new List<KeyValuePair<string, string>>();
            postData.Add(new KeyValuePair<string, string>("grant_type", "client_credentials"));
            postData.Add(new KeyValuePair<string, string>("client_id", "l97962b486095e64be6801dab86aa55076"));
            postData.Add(new KeyValuePair<string, string>("client_secret", "af9ee3251569f0a3d4ec68e413e6a371"));

            // NOTE: This is the sandbox version of the api
            Task<HttpResponseMessage> sRequest = client.PostAsync("https://apis-sandbox.fedex.com/oauth/token", new FormUrlEncodedContent(postData));
            Task<string> sResponse = sRequest.Result.Content.ReadAsStringAsync();
            Console.WriteLine("Response: \n" + sResponse.Result);
        }
    }
}

Output

Response:
{"access_token":"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","token_type":"bearer","expires_in":3599,"scope":"CXS-TP"}
Press any key to continue . . .

Bad Credentials Output

Response:
{"transactionId": "fe4c643d-79dc-4a98-bc63-505fdceca09c","errors":[{"code":"NOT.AUTHORIZED.ERROR","message":"The given client credentials were not valid. Please modify your request and try again."}]}
Press any key to continue . . .