def METHOD_NAME(auth0_erasure_identity_email: str, auth0_secrets, auth0_token):
    """
    Confirm whether user exists by calling user search by email API and comparing resulting firstname str.
    Returns user ID if it exists, returns None if it does not.
    """
    base_url = f"https://{auth0_secrets['domain']}"
    headers = {
        "Authorization": f"Bearer {auth0_token}",
    }
    user_response = requests.get(
        url=f"{base_url}/api/v2/users-by-email?email={auth0_erasure_identity_email}",
        headers=headers,
    )
    return user_response.json() if user_response.json() else None