hi. I have class Settings(BaseSettings):
    env_file = '.env'
    env_file_encoding = 'utf-8'
    db_url: PostgresDsn
    db_port: int 
    db_user: str
    db_name: str
    db_pass: str
    port: int
    host: str


settings = Settings()  How to use if i have file .env with # app configuration
HOST=127.0.0.1
PORT=8000

# db configuration
DB_HOST=localhost
DB_PORT=5432
DB_NAME=logging
DB_USER=postgres
DB_PASS=as