rsconnect list errors when no api-key included

[kgartland-rstudio]

As of rsconnect-python 1.10.0, the api-key is no longer required when adding a new server. However after adding a server with a missing api-key we return an error when running rsconnect list:

> rsconnect list
Server information from /Users/kgartland/Library/Application Support/rsconnect-python/servers.json

Nickname: "fuzz"
    URL: http://18.232.160.200:3939/
    API key is saved
Traceback (most recent call last):
  File "/Users/kgartland/.pyenv/versions/3.8.2/lib/python3.8/site-packages/rsconnect/actions.py", line 80, in cli_feedback
    yield
  File "/Users/kgartland/.pyenv/versions/3.8.2/lib/python3.8/site-packages/rsconnect/main.py", line 389, in list_servers
    if server["insecure"]:
KeyError: 'insecure'

We also display "API key is saved" when there is no API Key.

The servers.json file contains:

{
    "fuzz": {
        "name": "fuzz",
        "url": "http://18.232.160.200:3939/",
        "account_name": null,
        "token": null,
        "secret": null
    }
}

After adding an api_key to the config, the servers.json file looks like this:

{
    "fuzz": {
        "name": "fuzz",
        "url": "http://18.232.160.200:3939/",
        "api_key": "[REDACTED]",
        "insecure": false,
        "ca_cert": null
    }
}

I think if there is no -k provided, we default to shinyapps.io credential structure.