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The API reference for the collection access module is [here](http://devcenter.kinvey.com/rest/reference/business-logic/reference.html#collection-access-module). You will be able to delete your document with this.
Once you have written your endpoint you can schedule a weekly run using the schedule popover in the business logic editor like this...
yaelhh
Is it posible to do it through Kinvey? Can anyone help me?
Thanks, Yael