old_contents: """
  This Blueprint gives the ability of user logins, and login_required functionality using Flask-Login extension.
  """
  from flask import Blueprint, render_template, request, flash, redirect, url_for
  from flask_login import login_required, logout_user, login_user
  
  from extensions import login_manager
  from models import User
  
  login = Blueprint('login', __name__)
  
  login_manager.login_view = 'login.login_page'  # redirect to this when arrived a login_required view without logged in
  
  
  @login_manager.user_loader
  def load_user(user_id):
      """Get the User object given the user_id stored in the session.
  
      This is a callback function to reload the user object from the user ID stored in the session."""
      return User.query.get(int(user_id))
  
  
  @login.route('/login', methods=['GET', 'POST'])
  def login_page():
      if request.method == 'GET':
          return render_template('login.html')
  
      elif request.method == 'POST':
          email = request.form['email']
          password = request.form['password']
          user = User.query.filter_by(email=email).first()
          if user is not None and user.password == password:
              login_user(user, remember=True)
              fullname = user.fullname
              redirect_url = request.args.get('next')
              html = 'Logged in as email: {}, fullname: {}<br><a href="/">Home</a> '.format(email, fullname)
              if redirect_url:
                  html += '<a href="{}">Redirect</a>'.format(redirect_url)
              return html
          else:
              flash('Username or Password is invalid', 'error')
              return redirect(url_for('login'))
  
  
  @login.route("/logout")
  @login_required
  def logout_page():
      logout_user()
      return 'Logged out<br><a href="/">Home</a>'
  
new_contents: """
  This Blueprint gives the ability of user logins, and login_required functionality using Flask-Login extension.
  """
  from flask import Blueprint, render_template, request, flash, redirect, url_for
  from flask_login import login_required, logout_user, login_user
  
  from extensions import login_manager
  from models import User
  
  login = Blueprint('login', __name__)
  
  login_manager.login_view = 'login.login_page'  # redirect to this when arrived a login_required view without logged in
  
  
  @login_manager.user_loader
  def load_user(user_id):
      """Get the User object given the user_id stored in the session.
  
      This is a callback function to reload the user object from the user ID stored in the session."""
      return User.query.get(int(user_id))
  
  
  @login.route('/login', methods=['GET', 'POST'])
  def login_page():
      if request.method == 'GET':
          return render_template('login.html')
  
      elif request.method == 'POST':
          email = request.form['email']
          password = request.form['password']
          user = User.query.filter_by(email=email).first()
          if user is not None and user.password == password:
              login_user(user, remember=True)
              fullname = user.fullname
              redirect_url = request.args.get('next')
              html = 'Logged in as email: {}, fullname: {}<br><a href="/">Home</a> '.format(email, fullname)
              if redirect_url:
                  html += '<a href="{}">Redirect</a>'.format(redirect_url)
              return html
          else:
              flash('Username or Password is invalid', 'error')
              return redirect(url_for('login.login_page'))
  
  
  @login.route("/logout")
  @login_required
  def logout_page():
      logout_user()
      return 'Logged out<br><a href="/">Home</a>'
  
subject: fix incorrect login attempt redirection url