Azure PowerBi Embeded Token not working

Hi All,

Please suggest my about my problem which i am struggling since 3 days.

I am using .Net Core 2.2 and taken the sample code from github as document suggested by microsoft.

After changing the all config information, its not working.

Before that i did:

Using Azure account:

-Created application by choosing PoweBI Service

- Created group and assigned to this application including all service level permissons except tanent

 In PowerBi Portal :

Created fresh workspace and assign the same group which i had created (Using ServicePrincipal)

Then created Report under workspace.

Now In VS2017:

Using same sample code changed every config settings like 

Application Id, Tenent Id, Secrete key, workspaceId and reportId.

Result:

I am able to get Access Token but not able to get report . Its faling with 403/404 error code. (Forbidden and NotFound).

Please suggest me what