This guide is about coding an external service to respond to calls from the Password Import Inline Hook. An external service is the customer-provided piece of software that Okta calls when the Inline Hook fires.
See Password Import Inline Hook for a complete description of this Inline Hook type.
See Inline Hooks for a general conceptual overview of how Okta Inline Hooks work.
The sample code presented in this guide is meant as a demonstration of the steps any external service for the Password Import Inline Hook needs to implement: parsing requests from Okta, looking up received end user credentials in an existing user store, and responding to Okta with commands that indicate whether the end user credentials are valid.