Various bugs following change to ms_identity_python library

It looks like this app has not been run/tested since someone changed the library to `ms_identity_python`

Can you please advise whether this instance is deprecated, ie. are there other options to authenticate through Django for a downstream request to an externa API? This lib looked quite neat.

In settings.py:
-there is no `scopes` keyword in an `Auth ` object so this instantiation fails
-in settings.py, the following line does not work in INSTALLED_APPS as there is no app called 'identity'

"identity", # To utilize the default templates came with the identity package

> Please provide us with the following information:
> ---------------------------------------------------------------

### This issue is for a: (mark with an `x`)
```
- [x] bug report -> please search issues before submitting
- [ ] feature request
- [ ] documentation issue or request
- [ ] regression (a behavior that used to work and stopped in a new release)
```

### Minimal steps to reproduce
> follow the documentation - there are a few bugs following the change to ms_identity_python and the example does not work

### Any log messages given by the failure
> various errors

### Expected/desired behavior
> app does not run

### OS and Version?
> Windows 8, 10, or 11. Linux (which distribution). macOS (Mojave? Catalina? Big Sur? Monterey?)
Linux (not relevant)

### Versions
> Django 4.0.2 python

### Mention any other details that might be useful
In settings.py:
-there is no scopes keyword in an Auth object so this fails
-in settings.py, the following line does not work in INSTALLED_APPS as there is no app called 'identity'
"identity", # To utilize the default templates came with the identity package
> ---------------------------------------------------------------
> Thanks! We'll be in touch soon.

Start with settings.py and compare the Auth object configuration and INSTALLED_APPS entry against the current ms_identity_python documentation and this repository's sample setup. Reproduce the missing scopes keyword and missing identity app errors; done means the documented example runs with a supported authentication configuration or the obsolete instance and alternatives are clearly documented.

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