text: from flask import render_template, url_for, flash, redirect, request, Blueprint
  from flask_login import login_user, current_user, logout_user, login_required
  from app import db, bcrypt
  from app.models import User, Post
  from app.users.forms import (RegistrationForm, LoginForm, UpdateAccountForm, 
                                RequestResetForm, ResetPasswordForm)
  from app.users.utils import save_picture, send_reset_email
  
  users = Blueprint('users', __name__)
  
  #register function
  @users.route("/register", methods=['GET', 'POST'])
  def register():
      if current_user.is_authenticated:
          return redirect(url_for('main.home'))
      form = RegistrationForm()
      if form.validate_on_submit():
          hashed_password = bcrypt.generate_password_hash(form.password.data).decode('utf-8')
          user = User(username=form.username.data, email=form.email.data, password=hashed_password)
          db.session.add(user)
          db.session.commit()
          flash('Your account has been created! You are now able to log in', 'success')
          return redirect(url_for('users.login'))
      return render_template('register.html', title='Register', form=form)
  
  #Login function
  @users.route("/login", methods=['GET', 'POST'])
  def login():
      if current_user.is_authenticated:
          return redirect(url_for('main.home'))
      form = LoginForm()
      if form.validate_on_submit():
          user = User.query.filter_by(email=form.email.data).first()
          if user and bcrypt.check_password_hash(user.password, form.password.data):
              login_user(user, remember=form.remember.data)
              next_page = request.args.get('next')
              return redirect(next_page) if next_page else redirect(url_for('main.home'))
          else:
              flash('Login Unsuccessful. Please check email and password', 'danger')
      return render_template('login.html', title='Login', form=form)
  
  #Logout function
  @users.route("/logout")
  def logout():
      logout_user()
      return redirect(url_for('main.home'))
  
  #creating an account and picture save function
  @users.route("/account", methods=['GET', 'POST'])
  @login_required
  def account():
      form = UpdateAccountForm()
      if form.validate_on_submit():
          if form.picture.data:
              picture_file = save_picture(form.picture.data)
              current_user.image_file = picture_file
          current_user.username = form.username.data
          current_user.email = form.email.data
          db.session.commit()
          flash('Your account has been updated!', 'success')
          return redirect(url_for('users.account'))
      elif request.method == 'GET':
          form.username.data = current_user.username
          form.email.data = current_user.email
      image_file = url_for('static', filename='profile_pics/' + current_user.image_file)
      return render_template('account.html', title='Account',image_file=image_file, form=form) 
  
  #Displaying the posts for an author
  @users.route("/user/<string:username>")
  def user_posts(username):
      page = request.args.get('page',1,type=int)
      user = User.query.filter_by(username=username).first_or_404()
      posts = Post.query.filter_by(author=user)\
          .order_by(Post.date_posted.desc())\
          .paginate(page=page, per_page=5)
      return render_template('user_posts.html', posts=posts, user=user)
  
  #Reset password function
  @users.route("/reset_password", methods=['GET', 'POST'])
  def reset_request(): 
      if current_user.is_authenticated:
          return redirect(url_for('main.home'))  
      form = RequestResetForm()
      if form.validate_on_submit():
          user = User.query.filter_by(email=form.email.data).first()
          send_reset_email(user)
          flash('An email has been sent with instructions to reset your password.', 'info')
          return redirect(url_for('users.login')) 
      return render_template('reset_request.html', title='Reset Password', form=form) 
  
  #Reset token function
  @users.route("/reset_password/<token>", methods=['GET', 'POST'])
  def reset_token(token): 
      if current_user.is_authenticated:
          return redirect(url_for('main.home'))
      user = User.verify_reset_token(token) 
      if user is None:
          flash('That is an invalid or expired token', 'warning')
          return redirect(url_for('users.reset_request'))
      form = ResetPasswordform()
      if form.validate_on_submit():
          hashed_password = bcrypt.generate_password_hash(form.password.data).decode('utf-8')
          user.password = hashed_password
          db.session.commit()
          flash('Your password has been updated! You are now able to log in', 'success')
          return redirect(url_for('users.login')) 
      return render_template('reset_token.html', title='Reset Password', form=form)
  