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Authentication required (client_id & client_key is needed)
client_id and client_key is needed
Pay attention to the "access_token" as it is required for authenticating and sent via the Header of almost every API call

The anonymous authentication flow can be used to authenticate when the user already has the client id and client key (or secret). This authentication flow involves passing the client id and key. Use this authentication flow only when necessary. No refresh token will be issued.

This access token would be start point for next set of interactions with system.

Error Codes	Error Description
400 - Bad Request	Missing `client_key, client_id,grant_type`