After a successful authentication with the AWS Cognito Hosted UI, I am redirected to my callback url, example:

https://app.example.com/?code=16036818-2t63-4a31-98b0-e3c21aa9a24d

Using the Curl, I am able to obtain the Access Token using this request:

curl --location --request POST 'https://my-app.auth.eu-west-1.amazoncognito.com/oauth2/token' 
--data-urlencode 'grant_type=authorization_code' 
--data-urlencode 'client_id=47akl6j7j4grj2js419' 
--data-urlencode 'code=16036818-2t63-4a31-98b0-e3c21aa9a24d' 
--data-urlencode 'redirect_uri=https://app.example'

However, if I run the CURL again, it gives me this error message:

{
    "error": "invalid_grant"
}

**Question: Does this exchange only happens once? **

I was expecting to get the same result.