All the config toml suggestions of None are misleading

[nickfarrow]

If you actually use None for some parameters the toml will give a confusing error like

Traceback (most recent call last):
  File "/usr/local/lib/python3.7/dist-packages/gunicorn/app/base.py", line 111, in get_config_from_filename
    spec.loader.exec_module(mod)
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/root/SatSale/gunicorn.conf.py", line 1, in <module>
    from gateways import ssh_tunnel
  File "/root/SatSale/gateways/ssh_tunnel.py", line 5, in <module>
    import config
  File "/root/SatSale/config.py", line 17, in <module>
    config = toml.load(config_file)
  File "/usr/local/lib/python3.7/dist-packages/toml/decoder.py", line 156, in load
    return loads(f.read(), _dict, decoder)
  File "/usr/local/lib/python3.7/dist-packages/toml/decoder.py", line 514, in loads
    raise TomlDecodeError(str(err), original, pos)
toml.decoder.TomlDecodeError: This float doesn't have a leading digit (line 44 column 1 char 2335)

Should probably all be changed to "" or something along those lines.