curl --request POST \
  --url https://api.crevio.co/v1/customers/{customer_id}/tags \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '{}'

{
  "id": "<string>",
  "object": "<string>",
  "email": "<string>",
  "name": "<string>",
  "first_name": "<string>",
  "last_name": "<string>",
  "customer_type": "paid",
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z",
  "orders_count": 123,
  "total_spend": 123,
  "tags": "<array>"
}