Added revoke functionality

Src/Notion.Client/Api/Authentication/IAuthenticationClient.cs

@@ -18,14 +18,14 @@ Task<CreateTokenResponse> CreateTokenAsync(
             CreateTokenRequest createTokenRequest,
             CancellationToken cancellationToken = default
         );
-        
+
         /// <summary>
         /// Revokes an access token.
         /// </summary>
         /// <param name="revokeTokenRequest"></param>
         /// <param name="cancellationToken"></param>
         /// <returns></returns>
-        Task<CreateTokenResponse> RevokeTokenAsync(
+        Task RevokeTokenAsync(
             RevokeTokenRequest revokeTokenRequest,
             CancellationToken cancellationToken = default
         );

Src/Notion.Client/Api/Authentication/RevokeToken/AuthenticationClient.cs

@@ -1,21 +1,30 @@
+using System.Net.Http;
 using System.Threading;
 using System.Threading.Tasks;
 
 namespace Notion.Client
 {
     public sealed partial class AuthenticationClient
-    {   
-        public async Task<HttpStatusCode> RevokeTokenAsync(
+    {
+        public async Task RevokeTokenAsync(
             RevokeTokenRequest revokeTokenRequest,
             CancellationToken cancellationToken = default)
         {
             var body = (IRevokeTokenBodyParameters)revokeTokenRequest;
-            
-            return (await _client.PostAsync(
+
+            var response = await _client.PostAsync<HttpResponseMessage>(
                 ApiEndpoints.AuthenticationUrls.RevokeToken(),
                 body,
                 cancellationToken: cancellationToken
-            )).StatusCode;
+            );
+
+            if (!response.IsSuccessStatusCode)
+            {
+                throw new NotionApiException(response.StatusCode,
+                    null,
+                    "None success status code returned from revoke endpoint"
+                );
+            }
         }
     }
 }