Update get token response to include auth info

Author: stevejgordon

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

@@ -19,5 +19,8 @@ public class GetUserAccessTokenResponse : ResponseBase
 
 		[DataMember(Name ="type")]
 		public string Type { get; set; }
+
+		[DataMember(Name = "authentication")]
+		public AuthenticateResponse Authentication { get; set; }
 	}
 }

tests/Tests/XPack/Security/User/GetUserAccessToken/GetUserAccessTokenApiTests.cs

@@ -7,6 +7,8 @@
 using Elasticsearch.Net;
 using FluentAssertions;
 using Nest;
+using Tests.Configuration;
+using Tests.Core.Extensions;
 using Tests.Framework.EndpointTests;
 using Tests.Framework.EndpointTests.TestState;
 using static Elastic.Elasticsearch.Ephemeral.ClusterAuthentication;
@@ -63,6 +65,13 @@ protected override void ExpectResponse(GetUserAccessTokenResponse response)
 			response.Type.Should().NotBeNullOrEmpty().And.Be("Bearer");
 			response.ExpiresIn.Should().BeGreaterThan(0);
 			response.Scope.Should().Be("full");
+
+			if (TestConfiguration.Instance.InRange(">=7.11.0"))
+			{
+				response.Authentication.Should().NotBeNull();
+				response.Authentication.Username.Should().NotBeNullOrEmpty();
+				response.Authentication.Roles.Count.Should().BeGreaterThan(0);
+			}
 		}
 	}