Visitors cannot register new account with non-Philly home address

[tjnicolaides]

STR:

1. Navigate to http://notinphilly.org/
2. Click "Sign Up / Log In" and then choose "Sign Me Up" button. The registration modal appears.
3. Fill out the information for a new user. Choose a home address from outside the City of Philadelphia (example: 6 Station Rd, Ardmore, PA 19003).
4. Click "Register Now"

Result: registration modal hangs. No error is displayed to the user. API call to /api/users/ endpoint hangs and then times out.

Locally, the node server console displays an error:

(node:99009) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 2): TypeError: Cannot read property '_id' of null