text: from flask import render_template,redirect,url_for, flash,request
  from  . import auth
  from flask_login import login_user,logout_user,login_required, current_user
  from ..models import User
  
  from .forms import LoginForm,RegistrationForm
  import os
  
  from .. import db
  
  @auth.route('/login', methods=['GET', 'POST'])
  def login():
      login_form = LoginForm()
      if login_form.validate_on_submit():
          user = User.query.filter_by(email = login_form.email.data).first()
          if user is not None and user.verify_password(login_form.password.data):
              login_user(user,login_form.remember.data)
              return redirect(request.args.get("next") or url_for('main.index'))
          flash('Invalid username or Password')
      title = "login"
      return render_template('auth/login.html', login_form = login_form, title = title)
  
  @auth.route('/logout')
  @login_required
  def logout():
      logout_user()
      return redirect(url_for('main.index'))
  
  @auth.route('/register',methods = ['GET','POST'])
  def register():
      if current_user.is_authenticated:
          return redirect(url_for('main.index'))
      form = RegistrationForm()
      if form.validate_on_submit():
          user = User(email = form.email.data, username = form.username.data, password = form.password.data)
          db.session.add(user)
          db.session.commit()
  
          return redirect(url_for('auth.login'))
  
      title = "create account"
  
      return render_template('auth/register.html',registration_form = form, title = title)
  