fixed null reference in user manager

MediaBrowser.Server.Implementations/Library/UserManager.cs

@@ -106,10 +106,12 @@ namespace MediaBrowser.Server.Implementations.Library
         /// </summary>
         /// <param name="logger">The logger.</param>
         /// <param name="configurationManager">The configuration manager.</param>
-        public UserManager(ILogger logger, IServerConfigurationManager configurationManager)
+        /// <param name="userDataRepository">The user data repository.</param>
+        public UserManager(ILogger logger, IServerConfigurationManager configurationManager, IUserDataRepository userDataRepository)
         {
             _logger = logger;
             ConfigurationManager = configurationManager;
+            _userDataRepository = userDataRepository;
         }
 
         #region Events

MediaBrowser.ServerApplication/ApplicationHost.cs

@@ -220,12 +220,12 @@ namespace MediaBrowser.ServerApplication
             ZipClient = new DotNetZipClient();
             RegisterSingleInstance(ZipClient);
 
-            UserManager = new UserManager(Logger, ServerConfigurationManager);
-            RegisterSingleInstance(UserManager);
-
             UserDataRepository = new SQLiteUserDataRepository(ApplicationPaths, JsonSerializer, LogManager);
             RegisterSingleInstance(UserDataRepository);
 
+            UserManager = new UserManager(Logger, ServerConfigurationManager, UserDataRepository);
+            RegisterSingleInstance(UserManager);
+
             LibraryManager = new LibraryManager(Logger, TaskManager, UserManager, ServerConfigurationManager, UserDataRepository);
             RegisterSingleInstance(LibraryManager);