improve instantiation of YouTrackClient wrt BaseUrl

Author: rekolobov

src/YouTrackSharp/BearerTokenConnection.cs

@@ -90,10 +90,7 @@ public override async Task<YouTrackClient> GetAuthenticatedApiClient()
                     Timeout = _timeout
                 };
 
-                _youTrackClient = new YouTrackClient(_httpClient)
-                {
-                    BaseUrl = ServerUri.ToString().TrimEnd('/')  + "/api/"
-                };
+                _youTrackClient = new YouTrackClient(_httpClient);
             }
 
             // Authenticate?

src/YouTrackSharp/Generated/YouTrackSharp.Api.cs

@@ -27,7 +27,14 @@ public partial class YouTrackClient
 
         public string BaseUrl
         {
-            get { return _baseUrl; }
+            get
+            {
+                if (_baseUrl == null)
+                {
+                    _baseUrl = _httpClient.BaseAddress.ToString().TrimEnd('/') + "/api/";
+                };
+                return _baseUrl;
+            }
             set { _baseUrl = value; }
         }