chore: init commit from GitHub

SWAD.API/Services/MusicAPI/Auth/SpotifyAuthService.cs

@@ -0,0 +1,44 @@
+using System.Text.Json;
+using Microsoft.Extensions.Options;
+using SWAD.API.Consts.Enums;
+using SWAD.API.Models.Config.ApiServices;
+using SWAD.API.Models.JsonStructures.MusicAPI.Spotify;
+
+namespace SWAD.API.Services.MusicAPI.Auth;
+
+/// <inheritdoc />
+public class SpotifyAuthService : AbstractAuthService
+{
+    public SpotifyAuthService(IOptions<ApiServicesConfig> data)
+    {
+        ServiceType = MusicService.Spotify;
+        Data = data.Value.ServicesData.First(x => x.Name == ServiceType.ToString());
+    }
+
+    public override async Task<IAuthResponse?> GetToken()
+    {
+        using var httpClient = new HttpClient();
+        var content = new Dictionary<string, string>
+        {
+            { "grant_type", "client_credentials" },
+            { "client_id", Data.ClientId },
+            { "client_secret", Data.Secret }
+        };
+        try
+        {
+            var response = await httpClient.PostAsync(Data.Endpoints.Token, new FormUrlEncodedContent(content));
+            if (response.IsSuccessStatusCode)
+            {
+                var ans = await JsonSerializer.DeserializeAsync<SpotifyAuthResponse>(
+                    await response.Content.ReadAsStreamAsync());
+                return ans;
+            }
+        }
+        catch (Exception)
+        {
+            return null;
+        }
+
+        return null;
+    }
+}