import replicate expects REPLICATE_API_TOKEN to already be set in env #4

This doesn't work:

import replicate
from dotenv import load_dotenv

load_dotenv()

Because import replicate must be expecting the env var to already exist:

requests.exceptions.HTTPError: 401 Client Error: Unauthorized for url: https://api.replicate.com/v1/models/yuanxunlu/livespeechportraits/versions

This works:

from dotenv import load_dotenv
load_dotenv()
import replicate

In order to support .env-file based development workflows, we should update the client to read the token when the client is being exercised, instead of at load time, so the order of import statements won't matter.