Update starter python app with recommended IAM Method

[movinglightspeed]

Is your feature request related to a problem? Please describe.
Yes, IBM Cloud recommends using IAM-only Cloudant instances not IAM + Legacy, however all starter applications such as
https://github.com/IBM-Cloud/get-started-python use IAM Legacy method, a basic application that connects to a cloudant database on the IBM Cloud account using legacy credentials, none of them connect using IAM + Access token implementation that cloudant-python-sdk mentions and is recommended, though it's not clear because very easy to use the legacy credentials.

Describe the solution you'd like
If IAM only method for connecting to cloudant is recommended, please show in starter applications a implementation, because the starter applications show why the Legacy credentials for cloudant is the easier method and easier choice. I can easily pop in those creds and connect without issue, with IAM only, I have to use IAM API key and figure out a way to generate access token, trouble getting the access token to work with the IAM, how do I even go about it? No examples, I understand the security benefits but it is not at all easy for implementation.

Describe alternatives you've considered
+Use legacy credentials and generate new ones if there is a security breach.
+Applications that are connected on Cloud Foundry should not have to reference programatically cloudant credentials but should do this automagically on the backend, hence the connection between app and database.

Additional context
https://github.com/IBM-Cloud/get-started-python/blob/master/hello.py
IAM Legacy credentials examples are shown, but it's hard to see this cloudant python sdk implemented and it should be, as its recommended.

[emlaver]

@movinglightspeed thank you for bringing this to our attention. The getting started tutorial in https://github.com/IBM-Cloud/get-started-python is not maintained or supported by our team. Also, that tutorial is using our legacy python-cloudant library. Please use your existing ticket or a new ticket in the get-started-python repo to get support.

For more information on using IAM authentication in cloudant-python-sdk, see the authentication section in our Cloudant API docs.