Create new script to create client credentials in MongoDB

[val500]

Description

This creates a new script to create, edit, or delete client credentials from MongoDB. MongoDB login credentials must be specified using environment variables. User gets prompted for the new client_id and secret_key and must input the max_priority and allowed_queues data.

Resolved issues

Resolves https://warthogs.atlassian.net/browse/CERTTF-437

Documentation

Web service API changes

N/A

Tests

Tested locally using docker compose to spin up MongoDB. Creation, editing and deletion were all tested.

[plars]

A few comments below, but a few more general comments:

1. please run flake8/pylint/black -n79 on this
2. There's a big problem I found - you can add the same client ID more than once. We shouldn't allow that
3. There should be some confirmation step at the end where it shows you what it's going to add (except the secret) and ask to confirm whether to add it or not

[plars]

Found a couple more small issues, and I think there were still some earlier comments.

Additionally, I had trouble making it work if you use pip install. I know we use poetry, but we still try to import pip install for the charm, previous way of doing things, etc. And both should work fine

I did solve this with a few minor changes. I can just submit a patch against your branch if you prefer... just let me know, but might be easier for you to make the other changes first. But here are the things I needed to change to get it working:

• move tools to src/tools
• add a src/tools/init.py
• pyproject.toml: add this under tool.poetry section:

+packages = [
+    { include = "src" },
+]

• set client_credentials_admin = "src.tools.client_credentials_admin:main" (added "src" to the path)

[plars]

Ok, I think this works well enough for our short term needs. It's something we'll replace with an API pretty soon I hope, but it'll get us though until then. Thanks!