Calling Workflow from Appgyver

Hello experts,

I am calling workflow instance from Appgyver. I am getting bearer token and I am passing further to HTTP request (component installed from market)

I am passing URL : https://api.workflow-sap.cfapps.eu10.hana.ondemand.com/workflow-service/rest/v1/workflow-instances

And Header part passing as: accessToken is "Bearer <token ID>" I am getting it from previous HTTP request (GET)

Request Body I am preparing as JSON with definitionID and context.

When I execute it, I am getting below error:

 Full authentication is required to access this resource

Please guide me further, If I missing anything.

Thanks,

PD