text: from functools import wraps
  from flask import request, Response, current_app
  
  
  def check_auth(username, password):
      """This function is called to check if a username /
      password combination is valid.
      """
      return username == current_app.config['ADMIN_USERNAME']\
           and password == current_app.config['ADMIN_PASSWORD']
  
  def authenticate():
      """Sends a 401 response that enables basic auth"""
      return Response(
      'Could not verify your access level for that URL.\n'
      'You have to login with proper credentials', 401,
      {'WWW-Authenticate': 'Basic realm="Login Required"'})
  
  def requires_auth(f):
      @wraps(f)
      def decorated(*args, **kwargs):
          auth = request.authorization
          if not auth or not check_auth(auth.username, auth.password):
              return authenticate()
          return f(*args, **kwargs)
      return decorated