Problem with CreateUser (Newtonsoft.Json.JsonReaderException: Unexpected character encountered while parsing value: [. Path 'tags', line 1, position 159.) (#153)

Based on return Tags property type from RabbitMQ converter StringOrArrayConverter will convert data to comma delimited string.

Author: kmatyaszek

Source/EasyNetQ.Management.Client.IntegrationTests/ManagementClientTests.cs

@@ -134,10 +134,12 @@ public async Task Should_be_able_to_create_a_queue_with_plus_char_in_the_name()
         [Fact]
         public async Task Should_be_able_to_create_a_user()
         {
-            var userInfo = new UserInfo(testUser, "topSecret").AddTag("administrator");
+            var userTag = "administrator";
+            var userInfo = new UserInfo(testUser, "topSecret").AddTag(userTag);
 
             var user = await managementClient.CreateUserAsync(userInfo).ConfigureAwait(false);
             user.Name.Should().Be(testUser);
+            user.Tags.Should().Contain(userTag);
         }
 
         [Fact]

Source/EasyNetQ.Management.Client/Model/User.cs

@@ -1,9 +1,13 @@
+using EasyNetQ.Management.Client.Serialization;
+using Newtonsoft.Json;
+
 namespace EasyNetQ.Management.Client.Model
 {
     public class User
     {
         public string Name { get; set; }
         public string PasswordHash { get; set; }
+        [JsonConverter(typeof(StringOrArrayConverter))]
         public string Tags { get; set; }
     }
-}
+}

Source/EasyNetQ.Management.Client/Serialization/StringOrArrayConverter.cs

@@ -0,0 +1,32 @@
+using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
+using System;
+
+namespace EasyNetQ.Management.Client.Serialization
+{
+    public class StringOrArrayConverter : JsonConverter
+    {
+        public override bool CanConvert(Type objectType)
+        {
+            return objectType == typeof(string);
+        }
+
+        public override object ReadJson(
+          JsonReader reader,
+          Type objectType,
+          object existingValue,
+          JsonSerializer serializer)
+        {
+            JToken token = JToken.Load(reader);
+            if (token.Type == JTokenType.Array)
+                return string.Join(",", token.ToObject<string[]>());
+            else
+                return token.ToString();
+        }
+
+        public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
+        {
+            serializer.Serialize(writer, value);
+        }
+    }
+}