Attempt to index into config object like a dictionary

[Deborah-Digges]

Issue Summary

In config.py, config is an object but we try to index it like a dictionary as seen in this line. This causes the app to fail when I try to send an email.

Steps to Reproduce

1. python app.py
2. You will see the following stack trace:

Traceback (most recent call last):
  File "app.py", line 38, in <module>
    update()
  File "app.py", line 24, in update
    if config['export_tables']['PackageManagers']:
TypeError: 'Config' object is not subscriptable

Technical details:

• Python Version: 3.2.6
• Browser/OS: Chrome/MacOS
• Database/Version: Ver 8.0.12 for macos10.13 on x86_64 (MySQL Community Server - GPL)