i_can_write ist true als default

ChatController/LoginKlassen/ChatGruppenDaten.cs

@@ -1,4 +1,5 @@
 using System.Collections.Generic;
+using System.ComponentModel;
 using System.IO;
 using Newtonsoft.Json;
 
@@ -25,7 +26,8 @@ namespace ChatController.LoginKlassen
         [JsonProperty("accent_color")]
         public string AccentColor { get; set; }
 
-        [JsonProperty("i_can_write")]
+        [DefaultValue(true)]
+        [JsonProperty("i_can_write", DefaultValueHandling = DefaultValueHandling.Populate)]
         public bool CanWrite { get; set; }
 
         [JsonProperty("i_can_see_participants")]