Remove the space after Content-Type.  I.e. -H "Content-Type: application/json"

I am also try to do same it was not working Anyone share the working API command to get metering capacity details using power BI API Get Request. For that I need to pull the data 

How to pull report for below end point using curl 

/object/billing
/object/bucket
/object/capacity
/object/namespaces