code: '''Endpoints  POST /v1/customers/:id/sources   GET /v1/customers/:id/sources/:id  POST /v1/customers/:id/sources/:id  POST /v1/customers/:id/sources/:id/verifyDELETE /v1/customers/:id/sources/:id   GET /v1/customers/:id/sources?object=bank_account
  '''
nl: Bank AccountsThese bank accounts are payment methods on Customer objects.On the other hand External Accounts are transfer
  destinations on Account objects for Custom accounts.
  They can be bank accounts or debit cards as well, and are documented in the links above.