Adobe IO cloud Manager project CORS error

i am getting error while accessing API for cloud Manager -  Adobe IO cloud Manager project has been setup in Adobe IO console works fine using Postman and getting expected response on the API call.

When i tried to replicate same in JS Code/Fetch call, getting below error 

has been blocked by CORS policy: Request header field access-control-allow-methods is not allowed by Access-Control-Allow-Headers in preflight response.