Create an installment advancement. This is a DEPRECATED endpoint. Use the non-deprecated Create installment advancement endpoint instead.
An installment advancement is a transfer of one or more installments from future cycles to the present cycle. For more information, refer to Manage installments on the customer statement.

This endpont generates an Installment advanced event.

Note: This endpoint requires an account token - an access token encoded with a Pismo account ID. Tokens can expire quickly, which can result in a 401 Unauthorized message.