better account deletion, add keys to password change,add updating user storage

LarpixServer/Room/Requests.cs

@@ -396,7 +396,7 @@ public class Requests
         msg.type = "larp.text";
         msg.content = content;
         msg.attachment = attachment;
-        msg.key = "0"; // Flag for encrypted content
+        msg.key = "0"; //empty = no encryption, value = encryption key index
         msg.pervious = ""; 
         msg.responded = responded ?? "";
         msg.reactions = "";
@@ -435,7 +435,7 @@ public class Requests
                 }
             }
         }
-        return "success:message.sent";
+        return $"success:{nextId}";
     }
 
     public static async Task<string> DmMessageDelete(string id, string body)