Retrieved fields of data always null

I’m trying to make an app with a feature that allows users to view a map that has pinned locations pulled from the server on it.

I followed the instructions here: but was always getting nil when I tried to print any fields of my Locations object. Then I tried and read through but still have not been able to view the data in the fields of my table.

I’ve attached what I think are the relevant code fragments and my Locations table on the server. Does anyone have any suggestions for what I’m missing?

Thanks in advance!

Screen Shot 2016-04-30 at 11.42.25 AM.png

Fields of type Double must not be declared as optional. Please see the doc: