Switch to using LRU Cache for `get_user_info`

[TyTodd]

This will cause bugs if for some reason using different access tokens for users in the same script

# TODO: add persistent filesystem based cache mapping access_token to user_info. Currently takes ~1 second
def get_user_info(access_token: str) -> Dict[str, Any]:
    """
    Returns the user info for the given access token.
    Caches the user info in the global user_info variable.

    Args:
        access_token: The access token to get the user info for.

    Returns:
    ```python
        {
            "login": str,
            "email": str,
            "avatar_url": str,
            "name": str,
        }
    ```
    """
    global user_info
    if user_info:
        return user_info
    if USE_GITHUB:
        response = requests.get("https://api.github.com/user", headers=get_headers(access_token)).json()
        user_info = {
            "login": response["login"],
            "email": response["email"],
            "avatar_url": response["avatar_url"],
            "name": response["name"],
        }
    else:
        response = requests.get(f"https://{MODAIC_GIT_URL}/api/v1/user", headers=get_headers(access_token)).json()
        user_info = {
            "login": response["login"],
            "email": response["email"],
            "avatar_url": response["avatar_url"],
            "name": response["full_name"],
        }
    return user_info