Add --environment flag to sampleclient

docs/content/services-packages/gateway/usage.md

@@ -14,7 +14,7 @@ We provide a [sample client](http://github.com/spatialos/online-services/tree/ma
 1\. Navigate to `/services/csharp/SampleClient` and run:
 
 ```bash
-dotnet run -- --google_project "{{your_google_project_id}}" --playfab_title_id "{{your_playfab_title_id}}"
+dotnet run -- --google_project "{{your_google_project_id}}" --environment "{{your_environment}}" --playfab_title_id "{{your_playfab_title_id}}"
 ```
 
 If you have set everything up correctly, you should see the script log in to PlayFab, obtain a PIT, create a party and then queue for a game. It won't get a match just yet though - you don't have any deployments that fit the matcher's criteria.

services/csharp/SampleClient/Program.cs

@@ -17,6 +17,9 @@ public class SampleClientArguments
         [Option("google_project", HelpText = "Google project ID", Required = true)]
         public string GoogleProject { get; set; }
 
+        [Option("environment", HelpText = "Service environment", Required = true)]
+        public string Environment { get; set; }
+
         [Option("playfab_title_id", HelpText = "PlayFab title ID", Required = true)]
         public string PlayFabTitleId { get; set; }
 
@@ -30,7 +33,7 @@ public class SampleClientArguments
     class Program
     {
         private const string LocalEndPointUrlFormat = "localhost:{0}";
-        private const string CloudEndPointUrlFormat = "{0}.endpoints.{1}.cloud.goog:4000";
+        private const string CloudEndPointUrlFormat = "{0}-{1}.endpoints.{2}.cloud.goog:4000";
         private const string PitRequestHeaderName = "player-identity-token";
 
         static void Main(string[] args)
@@ -41,15 +44,15 @@ static void Main(string[] args)
                 {
                     var gatewayServiceUrl = parsedArgs.Local
                         ? string.Format(LocalEndPointUrlFormat, "4040")
-                        : string.Format(CloudEndPointUrlFormat, "gateway", parsedArgs.GoogleProject);
+                        : string.Format(CloudEndPointUrlFormat, "gateway", parsedArgs.Environment, parsedArgs.GoogleProject);
 
                     var partyServiceUrl = parsedArgs.Local
                         ? string.Format(LocalEndPointUrlFormat, "4041")
-                        : string.Format(CloudEndPointUrlFormat, "party", parsedArgs.GoogleProject);
+                        : string.Format(CloudEndPointUrlFormat, "party", parsedArgs.Environment, parsedArgs.GoogleProject);
 
                     var authServiceUrl = parsedArgs.Local
                         ? string.Format(LocalEndPointUrlFormat, "4042")
-                        : string.Format(CloudEndPointUrlFormat, "playfab-auth", parsedArgs.GoogleProject);
+                        : string.Format(CloudEndPointUrlFormat, "playfab-auth", parsedArgs.Environment, parsedArgs.GoogleProject);
 
                     var playerId = RandomString(15);
                     Console.WriteLine($"Using a randomly generated PlayFab player ID: {playerId}");