Update Webhook URL

curl --request POST \
  --url https://staging-api.getpartna.com/v4/user/webhook \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --header 'x-api-user: <api-key>' \
  --data '{
  "url": ""
}'

{
  "message": "success"
}