Adding token support

Models/Token.cs

@@ -0,0 +1,13 @@
+using Newtonsoft.Json;
+
+namespace TextSender_API.Models;
+
+public class Token
+{
+    #region Properties
+    [JsonProperty("access_token")]
+    public string? AccessToken { get; set; }
+    [JsonProperty("issued")]
+    public DateTime? Issued { get; set; }
+    #endregion
+}