More improvements to OIDC support

Oqtane.Client/Services/Interfaces/ISettingService.cs

@@ -38,6 +38,12 @@ namespace Oqtane.Services
         /// <returns></returns>
         Task UpdateSiteSettingsAsync(Dictionary<string, string> siteSettings, int siteId);
 
+        /// <summary>
+        /// Clears site option cache
+        /// </summary>
+        /// <returns></returns>
+        Task ClearSiteSettingsCacheAsync(int siteId);
+
         /// <summary>
         /// Returns a key-value dictionary of all page settings for the given page
         /// </summary>
@@ -149,7 +155,6 @@ namespace Oqtane.Services
         /// <returns></returns>
         Task<Dictionary<string, string>> GetSettingsAsync(string entityName, int entityId);
 
-
         /// <summary>
         /// Updates settings for a given entityName and Id
         /// </summary>
@@ -166,7 +171,6 @@ namespace Oqtane.Services
         /// <returns></returns>
         Task<Setting> GetSettingAsync(string entityName, int settingId);
 
-
         /// <summary>
         /// Creates a new setting
         /// </summary>