old_contents: from flask import Flask, jsonify
  from modals.modals import User, Bucket, Item
  from api.__init__ import create_app, db
  
  app = create_app('DevelopmentEnv')
  
  
  @app.errorhandler(404)
  def page_not_found(e):
      response = jsonify({'error': 'The request can not be completed'})
      response.status_code = 404
      return response
  
  
  if __name__ == '__main__':
      app.run()
  
new_contents: from flask import Flask, jsonify
  from modals.modals import User, Bucket, Item
  from api.__init__ import create_app, db
  
  app = create_app('DevelopmentEnv')
  
  
  @app.errorhandler(404)
  def page_not_found(e):
      response = jsonify({'error': 'The request can not be completed'})
      response.status_code = 404
      return response
  
  @app.errorhandler(401)
  def invalid_token(e):
      response = jsonify({'error': 'Invalid Token'})
      response.status_code = 401
      return response
  
  
  if __name__ == '__main__':
      app.run()
  
subject: Add error handler for invalid token