import Finch from '@tryfinch/finch-api';

const client = new Finch({
  clientID: process.env['FINCH_CLIENT_ID'], // This is the default and can be omitted
  clientSecret: process.env['FINCH_CLIENT_SECRET'], // This is the default and can be omitted
});

const account = await client.sandbox.connections.accounts.create({
  company_id: '182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e',
  provider_id: 'provider_id',
});

console.log(account.account_id);

{
  "connection_id": "a237a1c3-1a5e-44ae-a8fd-81f76fd715c2",
  "entity_id": "449e7a5c-69d3-4b8a-aaaf-5c9b713ebc65",
  "company_id": "b2e6a1c3-1a5e-44ae-a8fd-81f76fd715cf",
  "account_id": "449e7a5c-69d3-4b8a-aaaf-5c9b713ebc65",
  "provider_id": "gusto",
  "authentication_type": "credential",
  "products": [
    "company"
  ],
  "access_token": "7eb55bcf-6593-4040-afac-252ee1f78e20"
}