_assign_field_values tries to iterate over a string

[nrowealign]

Where did you get the code?
[- [ ] Downloaded from GitHub

• Downloaded from the Microsoft Graph quick start tool
• [ x] Followed the tutorial from Microsoft Graph tutorials](https://learn.microsoft.com/en-us/graph/tutorials/python-app-only?tabs=aad)

Describe the bug
_assign_field_values throws AttributeError: 'str' object has no attribute 'items' in kiota_serialization_json/json_parse_node.py

To Reproduce
Steps to reproduce the behavior:

1. copy the app-only tutorial
2. run the code
3. See error

Expected behavior
The code should not throw the exception.

Screenshots
N/A

Desktop (please complete the following information):

• OS: MacOS 13.0.1
• Browser no browser involved
• Version 22

Dependency versions

• Authentication library (MSAL, etc.) version: 1.21.0
• Graph library (Graph SDK, REST library, etc.) version: 1.0.0a4

Additional context
My code differs slightly from the tutorial in that I'm getting the information you put in a config file from the environment, but other than that it's identical. If I edit kiota_serialization_json/json_parse_node.py and add print(object_dict) right before the for key, val in object_dict.items(): line, I am getting the expected data, but it's not being parsed (it's still a string.)

[nrowealign]

I see microsoft/kiota-serialization-json-python#83 Sorry for the duplicate.