Update Customer

curl --request PUT \
     --url https://sandboxapi.onbrails.com/api/v1/customers/customer_id \
     --header 'Authorization: Bearer YOUR_SECRET_KEY' \
     --header 'accept: application/json' \
     --header 'content-type: application/json' \
     --data '
{
  "email": "string",
  "firstName": "string"
}
'

{
"status": true,
"message": "successfully updated customer",
"data": {
  "id": "1e258349-2043-4ca1-b39c-8418f9e0d36d",
  "createdAt": "2021-08-26T11:15:23.788Z",
  "updatedAt": "2021-08-26T11:19:02.287Z",
  "firstName": "Bob",
  "lastName": "Wonder",
  "email": "bob@braills.com",
  "phone": "9021534385",
  "countryCode": "+234",
  "blacklist": false,
  "transactions": []
}
}