Create a contact

curl --request POST \
  --url https://app.chatwoot.com/public/api/v1/inboxes/{inbox_identifier}/contacts \
  --header 'Content-Type: application/json' \
  --data '{
  "identifier": "1234567890",
  "identifier_hash": "e93275d4eba0e5679ad55f5360af00444e2a888df9b0afa3e8b691c3173725f9",
  "email": "alice@acme.inc",
  "name": "Alice",
  "phone_number": "+123456789",
  "custom_attributes": {}
}'

{
  "id": 123,
  "source_id": "<string>",
  "name": "<string>",
  "email": "<string>",
  "pubsub_token": "<string>"
}