text: import os
  from datetime import datetime, timedelta
  from typing import Optional
  
  from fastapi.security import OAuth2PasswordBearer
  
  from jose import jwt
  from passlib.context import CryptContext
  
  from dotenv import load_dotenv
  
  
  load_dotenv()
  
  
  SECRET_KEY = os.getenv('SECRET_KEY')
  ALGORITHM = "HS256"
  ACCESS_TOKEN_EXPIRE_MINUTES = 300
  
  
  pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
  
  
  oauth2_scheme = OAuth2PasswordBearer(tokenUrl="api/v1/token")
  
  
  def get_password_hash(password):
      return pwd_context.hash(password)
  
  
  def verify_password(plain_password, hashed_password):
      return pwd_context.verify(plain_password, hashed_password)
  
  
  def create_access_token(data: dict, expires_delta: Optional[timedelta] = None):
      to_encode = data.copy()
      if expires_delta:
          expire = datetime.utcnow() + expires_delta
      else:
          expire = datetime.utcnow() + timedelta(minutes=15)
      to_encode.update({"exp": expire})
      encoded_jwt = jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
      return encoded_jwt
  