Edit request to send own source, does not send data to django backend

Question

I use facebook login via django-rest-auth and react to native.

I installed facebook sdk correctly and was able to get the access token, but when I try to send it to the backend, it gives me a Bad Request error.

After debugging, I found that no data was sent to the server.

I thought this could be due to CORS as the application is in localhost: 8001 and django in localhost: 8000, but I installed django-cors-headers and still no data was sent.

Please help me here .. here is the code for the query request.

fetch(loginUrl, {
  method: 'post',
  headers: {
    'Content-Type': 'application/json',
    'Accept': 'application/json'
  },
  body: JSON.stringify({
    data:'ahahah'
  })
})
.then((response) => {
  alert(response)
})
.catch((error) => {
  alert(error)
})