As an ASP, how do I connect my customer's Instagram account to a Conversation API app?

If you are an ASP and want to onboard your end-clients to Instagram - you need to add a Meta login button to your dashboard and grant access to the end-clients. Your ASP’s server will need to leverage PAPI to do the interaction while Sinch will manage the onboarding on Sinch end.

Learn more about the Sinch Messenger API for Instagram.