text: from sqlalchemy import create_engine
  # from sqlalchemy.ext.declarative import as_declarative
  from sqlalchemy.orm import sessionmaker
  from sqlalchemy.ext.declarative import declarative_base
  
  SQLALCHEMY_DATABASE_URL = "postgresql://crypto:3xaG3adhgDadXAxDBADgAA36Xda7B@127.0.0.1:5432/fastapi"
  
  # engine = create_engine(SQLALCHEMY_DATABASE_URL, connect_args={"check_same_thread": False}) only for sqllite
  engine = create_engine(SQLALCHEMY_DATABASE_URL)
  
  SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
  
  Base = declarative_base()
  