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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_api_envs():
 """Get required API keys from environment variables."""

    client_id = os.environ.get('CLIENT_ID')
    user_id = os.environ.get('USER_ID')
    if not client_id or not user_id:
        raise ValueError('API keys are not found in the environment')
    return client_id, user_id