Access token is missing or invalid - cloudmessage

Hi,

getting the following response while trying to send a request to ‘cloudmessage’ API.

{“code”:“INVALID_ACCESS_TOKEN”,“httpStatus”:401,“message”:“Access token is missing or invalid.”,“developerMessage”:“authorization header must carry access token.”,“requestId”:“eb9c5817-4660-4a45-bac7-4fbb37dcdbb7”}

Please make sure the HTTP request has the header:

Authorization: Bearer {access_token}