#https://www.digitalocean.com/community/tutorials/how-to-add-authentication-to-your-app-with-flask-login#step-1-installing-packages from flask import render_template, session from app.errors import bp @bp.route('/quandary') def quandary(): error_message = session.pop('error_message') return render_template("errors/quandary.html", error_message=error_message)