The flow status specified in Step 3 calls the action service to present the appropriate input form to end users, which in this example shows fields to submit a username and password.

You can use the POST /{environmentId}/flows/{flowId} endpoint to initiate the usernamePassword.check action. This operation uses the application/vnd.pingidentity.usernamePassword.check+json custom media type as the content type in the request header when there is no user associated with the current flow.