One Drive Integration Problem

Steps Done 
1. App registration on azure portal.
2.Admin Consent on Azure.
3.Getting Access token from  login.microsoftonline.com/.../token
4. Use the access token to call Microsoft Graph works for https://graph.microsoft.com/v1.0/users



but While Calling Graph Api to access OneDrive https://graph.microsoft.com/v1.0/users/{user-id}/drive  After Admin Consent I received the error "Tenant does not have a SPO license" . Is this the free version issue or i need to add Office 365 to my existing tenant and how to do that ?

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