fixes for pydantic v2

[crowncastlejsl]

Overview

pydantic<3,>1.7 from the requirements.txt resolves to v.6.1, which has some backwards incompatibility with v1

Reproducing

Code snippet to reproduce:

from label_studio_sdk import Client

API_KEY = os.environ["LABEL_STUDIO_API_KEY"]
ls = Client(url=LABEL_STUDIO_URL, api_key=API_KEY)
assert ls.check_connection()["status"] == "UP", 'Connection status is not UP'
user_table = ls.get_users()

Error:

pydantic_core._pydantic_core.ValidationError: 1 validation error for User
org_membership
  Field required [type=missing, input_value={'id': 1, 'first_name': '...ject at 0x7f9712a4ff50>}, input_type=dict]
    For further information visit https://errors.pydantic.dev/2.6/v/missing

Details

Client.get_users makes an API call to /api/users which never returns an org_membership field, according to the API reference

The Optional field works differently in Pydantic v2, and is actually required.

Fix

• Added defaults for some Optional fields
• Sorted some imports with isort