curl --request POST \
  --url https://api.tinyinbox.app/public/widget-session \
  --header 'Content-Type: application/json' \
  --data '
{
  "siteKey": "tin_abc123",
  "visitorId": "<string>",
  "identityToken": "<string>"
}
'

{
  "settings": {
    "siteId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "publicKey": "<string>",
    "name": "<string>",
    "accentColor": "<string>",
    "welcomeMessage": "<string>"
  },
  "token": "<string>",
  "expiresAt": "2023-11-07T05:31:56Z",
  "visitor": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "externalId": "<string>",
    "name": "<string>",
    "email": "jsmith@example.com"
  }
}