I'm using the AWS Alexa for Business Go SDK and while there are functions for CreateContact, DeleteContact, GetContact, SearchContacts, there isn't a function for ListContacts while there are List APIs for other objects ListConferenceProviders.
https://docs.aws.amazon.com/sdk-for-go/api/service/alexaforbusiness/
How can one get a list of contacts for Alexa for Business?
While there isn't a ListContacts API, the SearchContacts API can be used with an empty filter slice in SearchContactsInput as follows:
resp, err := svc.SearchContacts(
&alexaforbusiness.SearchContactsInput{})
For testing purposes, it will also work to have a Filter with an empty Values slice, even if Key is populated.