Adjust Auth on server (#15)

* add auth that verifies identity is marked online

* few changes for testing

* handle identity with requirements

* remove unnecessary logging from auth handler

* change to UserRequirements

* fixes to checks

* fixes to UserRequirementHandler

Co-authored-by: rootdarkarchon <root.darkarchon@outlook.com>

MareSynchronosServer/MareSynchronosServer/Services/GrpcClientIdentificationService.cs

@@ -40,6 +40,11 @@ public class GrpcClientIdentificationService : IHostedService
         _metrics = metrics;
     }
 
+    public bool IsOnCurrentServer(string uid)
+    {
+        return OnlineClients.ContainsKey(uid);
+    }
+
     public string? GetCharacterIdentForUid(string uid)
     {
         if (OnlineClients.TryGetValue(uid, out var ident))