Added: userData in IndexSettings

Fix #601

Author: Ant-hem

src/Algolia.Search.Test/EndToEnd/Index/SettingsTest.cs

@@ -129,14 +129,15 @@ public async Task TestSettings()
                     {"de", new List<string> {"attribute1", "attribute2"}},
                     {"fi", new List<string> {"attribute3"}}
                 },
-                KeepDiacriticsOnCharacters = "øé"
+                KeepDiacriticsOnCharacters = "øé",
+                UserData = "User data"
             };
 
             var saveSettingsResponse = await _index.SetSettingsAsync(settings);
             saveSettingsResponse.Wait();
 
             var getSettingsResponse = await _index.GetSettingsAsync();
-            var spceficPropertiesCheck = new List<string> { "AlternativesAsExact", "DecompoundedAttributes", "CustomSettings" };
+            var spceficPropertiesCheck = new List<string> { "AlternativesAsExact", "DecompoundedAttributes", "CustomSettings", "UserData" };
             Assert.True(TestHelper.AreObjectsEqual(settings, getSettingsResponse, spceficPropertiesCheck.ToArray()));
 
             // Check specific properties (couldn't be done by the helper)
@@ -145,6 +146,7 @@ public async Task TestSettings()
             Assert.True(getSettingsResponse.DecompoundedAttributes["de"].Contains("attribute2"));
             Assert.True(getSettingsResponse.DecompoundedAttributes.ContainsKey("fi"));
             Assert.True(getSettingsResponse.DecompoundedAttributes["fi"].Contains("attribute3"));
+            Assert.AreEqual(getSettingsResponse.UserData.ToString(), settings.UserData.ToString());
 
             // Set new values
             settings.TypoTolerance = "min";

src/Algolia.Search/Models/Settings/IndexSettings.cs

@@ -23,7 +23,6 @@
 
 using Algolia.Search.Serializer;
 using Newtonsoft.Json;
-using Newtonsoft.Json.Linq;
 using System.Collections.Generic;
 
 namespace Algolia.Search.Models.Settings
@@ -337,5 +336,11 @@ public class IndexSettings
         /// </summary>
         [JsonExtensionData]
         public IDictionary<string, object> CustomSettings { get; set; }
+
+        /// <summary>
+        /// Custom userData that could be added to the IndexSettings
+        /// </summary>
+        [JsonConverter(typeof(MultiTypeObjectConverter))]
+        public object UserData { get; set; }
     }
 }