curl --request POST \
  --url http://localhost:3001/api/v1/business/auth/token \
  --header 'Content-Type: application/json' \
  --data '
{
  "apiKey": "bk_live_abc123...",
  "apiSecret": "bs_live_xyz789..."
}
'

{
  "success": true,
  "data": {
    "accessToken": "<string>",
    "tokenType": "<string>",
    "expiresIn": 123,
    "businessId": "<string>",
    "businessName": "<string>"
  }
}