How to solve Flutter Web CORS issue to call twitter api

Question

Here I am fetching user data from twitter API and this is the below code to get data from twitter API.

String findUserByIdurl =
        "https://api.twitter.com/2/users?ids=${cookieValue}&user.fields=profile_image_url";
    Map<String, String>? header = {
      'Access-Control-Allow-Origin': '*',
      "Access-Control-Allow-Credentials": "true",
      "Authorization": "Bearer $bearerToken"
    };
    var findUserByIduri = Uri.parse(findUserByIdurl);
    http.Response findUserByIdRes = await http.get(
      findUserByIduri,
      headers: header,
    );

Here I have set all the required headers also but still getting this type of error:

Access to XMLHttpRequest at 'https://api.twitter.com/2/users?ids=1385217534681440259&user.fields=profile_image_url' from origin 'http://localhost:8000' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.

Any suggestions on how to solve this issue?