External Accounts
Submit Plaid public token
After the customer completes Plaid Link authentication, the platform should POST the public_token to this callback URL (provided in the link token response).
This will trigger asynchronous processing:
- Lightspark exchanges the public_token for an access_token with Plaid
- Lightspark retrieves and verifies the account details
- An external account is created
- A webhook notification is sent to the platform when complete