Entity matching retrieve endpoint does not return None

[KristianVangsnes]

System information (please complete the following information):

• OS: [14.1.2 (23B92)
• Python Version: Python/3.10.5
• SDK Version: Latest

Describe the bug
The client.entity_matching.retrieve endpoint raises an error if the model does not exist. It should return None.

To Reproduce
Runnable code reproducing the error.

from cognite.client import CogniteClient

client = CogniteClient()

client.entity_matching.retrieve(external_id = "1234")
#assuming that model with ex_id = "1234" does not exist.

Expected behavior
It should not raise an error, but return None.

cognite-sdk-python/cognite/client/_api/entity_matching.py

Line 43 in 50e35ac

def retrieve(self, id: int | None = None, external_id: str | None = None) -> EntityMatchingModel | None: