Update token response

Author: stevejgordon

src/Nest/XPack/Security/User/GetUserAccessToken/GetUserAccessTokenResponse.cs

@@ -21,6 +21,35 @@ public class GetUserAccessTokenResponse : ResponseBase
 		public string Type { get; set; }
 
 		[DataMember(Name = "authentication")]
-		public AuthenticateResponse Authentication { get; set; }
+		public Authentication Authentication { get; set; }
+	}
+
+	public class Authentication : ResponseBase
+	{
+		[DataMember(Name = "email")]
+		public string Email { get; internal set; }
+
+		[DataMember(Name = "full_name")]
+		public string FullName { get; internal set; }
+
+		[DataMember(Name = "metadata")]
+		public IReadOnlyDictionary<string, object> Metadata { get; internal set; }
+			= EmptyReadOnly<string, object>.Dictionary;
+
+		[DataMember(Name = "roles")]
+		public IReadOnlyCollection<string> Roles { get; internal set; }
+			= EmptyReadOnly<string>.Collection;
+
+		[DataMember(Name = "username")]
+		public string Username { get; internal set; }
+
+		[DataMember(Name = "authentication_realm")]
+		public RealmInfo AuthenticationRealm { get; internal set; }
+
+		[DataMember(Name = "lookup_realm")]
+		public RealmInfo LookupRealm { get; internal set; }
+
+		[DataMember(Name = "authentication_type")]
+		public string AuthenticationType { get; internal set; }
 	}
 }