An Authentication object was not found in the SecurityContext, an error with fetch request

Question

I'm trying to call to an API endpoint using cURL and fetch(JavaScript), as it works fine with cURL where it's equal fetch doesn't.

Here is the cURL request:

curl -i -L -H 'Accept: application/json' --data 'client_id=[ID]&c
lient_secret=[SECRET]&grant_type=authorization_code&red
irect_uri=[REDIRECT_URI]&code=[CODE]' https://orcid.org/oauth/token

Where fetch:

 fetch("https://orcid.org/oauth/token", {
        method: "POST",
        headers: {
          Accept: "application/json",
        },
        body: `client_id=[ID]&c
lient_secret=[SECRET]&grant_type=authorization_code&red
irect_uri=[REDIRECT_URI]&code=[CODE]`,
      })
        .then((res) => res.json())
        .then((data) => {
          console.log(data);
        })
        .catch((error) => console.log(error));

ERROR:

www-authenticate: Bearer realm="orcid", error="unauthorized", error_description="An Authentication object was not found in the SecurityContext"