Why GetReport in PBIWebAPP sample does not return reports?

Hi,

I wanted toknow how to embed POwerBI in a web application. So I downloaded PBIWebAPP sample.  Then reistered the web app and got ClicentId and Clientsecret. After I signed in to POwer BI, I clicked GetReports button, I got back nothing. And I cannot figure out why. The following is the response content:

 

{

"@odata.context":"http://api.powerbi.com/beta/myorg/$metadata#reports","value":[

 

]

}

 

Please help!

 

Thanks