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using System;

using System.Collections.Generic;

using System.Net.Http;

using System.Text;

using System.Threading.Tasks;

using Newtonsoft.Json;

using SpotifyAPI.Web.Models;

namespace SpotifyAPI.Web.Auth

{

public class CredentialsAuth

{

public string ClientSecret { get; set; }

public string ClientId { get; set; }

public ProxyConfig ProxyConfig { get; set; }

public CredentialsAuth(string clientId, string clientSecret)

{

ClientId = clientId;

ClientSecret = clientSecret;

}

public async Task<Token> GetToken()

{

string auth = Convert.ToBase64String(Encoding.UTF8.GetBytes(ClientId + ":" + ClientSecret));

List<KeyValuePair<string, string>> args = new List<KeyValuePair<string, string>>

{

new KeyValuePair<string, string>("grant_type", "client_credentials")

};

HttpClientHandler handler = ProxyConfig.CreateClientHandler(ProxyConfig);

HttpClient client = new HttpClient(handler);

client.DefaultRequestHeaders.Add("Authorization", $"Basic {auth}");

HttpContent content = new FormUrlEncodedContent(args);

HttpResponseMessage resp = await client.PostAsync("https://accounts.spotify.com/api/token", content);

string msg = await resp.Content.ReadAsStringAsync();

return JsonConvert.DeserializeObject<Token>(msg);

}

}

}