Start by obtaining the access token by using the demo credentials below and Client Credentials -endpoint.
Demo Credentials
Use these demo credentials to get the bearer token to test the API:
Client Id: app.osholnjs77mo8gy92ijgn5l23sfd
Client Secret: M8u4m3cqyLDrO6hpMLl2rkk2Txsl38aIWUroi52AomA=Access token endpoint response will get you a bearer token that you can use with other endpoint calls.