Generating Access Tokens for Server Side APIs

Got to know that oAuth is not supported in AEMaaCS. So I was following this article to generate access token for server side APIs https://experienceleague.adobe.com/docs/experience-manager-cloud-service/content/implementing/developing/generating-access-tokens-for-server-side-apis.html?lang=en#

After creating the Technical Account I need to generate the access token in exchange of jwt token, to do that adobe has provided couple of solutions in different languages (https://github.com/AdobeDocs/adobe-dev-console/tree/main/samples/adobe-jwt-java ). For java/dotnet based solution we are supposed to generate certificate and private key using openssl and then need to upload it to Adobe IO Console-> Your Integration-> Public keys and then need to get the private key to required format. Now I'm not able to find, where exactly I can upload this certificate in Adobe IO Console. I cant see any upload option at the mentioned console.