SharePoint 2013 Apps and Business Connectivity Services

Hi All,

I have created two different projects,

1) BCS solution (farm only) and connect with Oracle database to bring Employees information then I created External List which utilizes the external content type generated from the project and yes the results appear.

2) I created a Sharepoint 2013 App project so as to utilize the external list using Rest ful api created in the previous project.

Now to my surprise I am not able to access this list due to permission denied. As I search I found App-Scoped External List, which is bring data from OData source, but in my case I have oracle database.

How to fix the permission denied error? 

Thanks,

Faraz Javaid