Fix emby/users/public not taking into account first run

The previous implementation was not taking in account the first seup
phase. Now the check has been added.

A little method refactor has been done in order to make the code more
elegant.

MediaBrowser.Api/UserService.cs

@@ -273,29 +273,31 @@ namespace MediaBrowser.Api
         /// <returns>System.Object.</returns>
         public object Get(GetPublicUsers request)
         {
-            var users = _userManager
+            var result = _userManager
                 .Users
-                .Where(item => !item.Policy.IsDisabled)
-                .Where(item => !item.Policy.IsHidden);
+                .Where(item => !item.Policy.IsDisabled);
 
+            if (ServerConfigurationManager.Configuration.IsStartupWizardCompleted)
+            {
                 var deviceId = _authContext.GetAuthorizationInfo(Request).DeviceId;
+                result = result.Where(item => !item.Policy.IsHidden);
 
                 if (!string.IsNullOrWhiteSpace(deviceId))
                 {
-                users = users.Where(i => _deviceManager.CanAccessDevice(i, deviceId));
+                    result = result.Where(i => _deviceManager.CanAccessDevice(i, deviceId));
                 }
 
                 if (!_networkManager.IsInLocalNetwork(Request.RemoteIp))
                 {
-                users = users.Where(i => i.Policy.EnableRemoteAccess);
+                    result = result.Where(i => i.Policy.EnableRemoteAccess);
+                }
             }
 
-            var result = users
+            return ToOptimizedResult(result
                     .OrderBy(u => u.Name)
                     .Select(i => _userManager.GetPublicUserDto(i, Request.RemoteIp))
-                .ToArray();
-
-            return ToOptimizedResult(result);
+                    .ToArray()
+                );
         }
 
         /// <summary>