curl --request POST \
  --url https://api.useduro.com/v1/customers \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "email": "jsmith@example.com",
  "phone": "2348012345678",
  "name": "<string>",
  "merchantRef": "<string>",
  "metadata": {}
}
'

{
  "id": "<string>",
  "email": "<string>",
  "phone": "<string>",
  "name": "<string>",
  "merchantRef": "<string>",
  "blacklisted": true,
  "blacklistReason": "<string>",
  "createdAt": "<string>"
}