curl --request POST \
  --url https://identity-sandbox.payven.com.tr/api/v1/auth/{slug}/refresh \
  --header 'Content-Type: application/json; ver=1.0' \
  --data '
{
  "refresh_token": "<string>"
}
'

{
  "access_token": "<string>",
  "refresh_token": "<string>",
  "expires_in": 123,
  "refresh_expires_in": 123,
  "token_type": "<string>",
  "scope": "<string>"
}