chore: init commit from GitHub

SWAD.API/Models/JsonStructures/MusicAPI/DefaultAuthResponse.cs

@@ -0,0 +1,28 @@
+using System.Text.Json.Serialization;
+using SWAD.API.Services.MusicAPI.Auth;
+
+namespace SWAD.API.Models.JsonStructures.MusicAPI;
+
+public abstract class DefaultAuthResponse : IAuthResponse
+{
+    private int? _expire;
+    private DateTime? _revokedAt;
+
+    [JsonPropertyName("access_token")]
+
+    // ReSharper disable once NullableWarningSuppressionIsUsed
+    public string Token { get; set; } = null!;
+
+    [JsonPropertyName("expires_in")]
+    public int? ExpireTime
+    {
+        get => _expire;
+        set
+        {
+            _expire = value;
+            _revokedAt = DateTime.UtcNow;
+        }
+    }
+
+    public DateTime? ExpireAt => _revokedAt?.AddSeconds(ExpireTime ?? 0);
+}