Access-Control-Allow-Credentials

Access-Control-Allow-Credentials is a CORS (Cross-Origin Resource Sharing) header that indicates whether credentials such as cookies, authorization headers or TLS client certificates should be included in a cross-origin request. If this header is set to true, the browser will allow the request to include credentials. Otherwise, the browser will not include credentials in the request, even if they are present. This header is important for security reasons, as it prevents malicious websites from accessing sensitive data stored in other websites