content: import sqlalchemy as sa
  from flask_httpauth import HTTPBasicAuth, HTTPTokenAuth
  from app import db
  from app.models import User
  from app.api.errors import error_response
  
  basic_auth = HTTPBasicAuth()
  token_auth = HTTPTokenAuth()
  
  
  @basic_auth.verify_password
  def verify_password(username, password):
      user = db.session.scalar(sa.select(User).where(User.username == username))
      if user and user.check_password(password):
          return user
  
  
  @basic_auth.error_handler
  def basic_auth_error(status):
      return error_response(status)
  
  
  @token_auth.verify_token
  def verify_token(token):
      return User.check_token(token) if token else None
  
  
  @token_auth.error_handler
  def token_auth_error(status):
      return error_response(status)
  