344 except ImportError as e:
--> 345 raise ImportError('email-validator is not installed, run `pip install pydantic[email]`') from e
ImportError: email-validator is not installed, run `pip install pydantic[email]`
4 import logging
5 from typing import Optional, List
----> 7 import backoff # type: ignore
8 import requests
9 from pydantic import BaseModel, EmailStr
ModuleNotFoundError: No module named 'backoff'