Mini Social Media Network Python Course Error

from flask import (Flask, g, render_template, flash, redirect, url_for, abort)
from flask.ext.bcrypt import check_password_hash
from flask.ext.login import LoginManager, login_user, logout_user, login_required, current_user

import forms
import models

DEBUG = True
PORT = 8000
HOST = '10.0.0.17'

app = Flask(__name__)
app.secret_key = 'ASD*ER*EFU&E*FHE*T(T&*#$&A*%$DFDSFUSHDFJSBERBV'

login_manager = LoginManager()
login_manager.init_app(app)
login_manager.login_view = 'login'

@login_manager.user_loader
def load_user(userid):
    try:
        return models.User.get(models.User.id == userid)
    except models.DoestNotExist:
        return None
@app.before_request
def before_request():
    """Connect to the database before each request"""
    g.db = models.DATABASE
    g.db.connect()
    g.user = current_user

@app.after_request
def after_request(response):
    """Close the database connection after each request"""
    g.db.close()
    return response

@app.route('/register', methods=('GET', 'POST'))
def register():
    form = forms.RegisterForm()
    if form.validate_on_submit():
        flash("Yes, you registered!", "Sucess")
        model.User.create_user(
            username=form.username.data,
            email=form.email.data,
            password=form.password.data
        )
        return redirect(url_for('index'))
    return render_template('register.html', form=form)

def login():
    form = forms.LoginForm()
    if form.validate_on_submit():
        try:
            user = models.User.get(models.User.enail == form.data)
        except models.DoestNotExist:
            flash("Your email or password doesn't match")
        else:
            if check_password_hash(user.password, form.password.data):
                login_user(user)
                flash("You've been logged in!", "Sucess")
                return redirect(url_for('index'))
            else:
                flash("Your email or password doesn't match")
    return render_template('login.html', form=form)

@app.route('/logout')
@login_required
def logout():
    login_user
    flash("You have been logged out!  Come back soon.", "Sucess")
    return redirect(url_for('index'))


@app.route('/new_post', methods=('GET', 'POST'))
@login_required
def post(): 
    form = forms.PostForm()
    if form.validate_on_submit():
        models.Post.create(user=g.user._get_current_object(),
                           content=form.content.data.strip())
        flash("Message Posted! Thanks!", "Sucess")
        return redirect(url_for('index'))
    return render_template('post.html', form=form)

@app.route('/')
def index():
    stream = models.Post.select().limit(100)
    return render_template('stream.html', stream=stream)

@app.route('/stream')
@app.route('/stream/<username>')

def stream(username=None):
    template = 'stream.html'
    if username and username != current_user.username:
        try:
            user = models.User.select().where(models.User.username**username).get()
            stream = user.posts.limit(100)
        except models.DoestNotExist:
            abort(404)
    else:
        stream = current_user.get_stream().limit(100)
        user = current_user
    if username:
        template = 'user_stream.html'
    return render_template(template, stream=stream, user=user)

@app.route('/post/<int:post_id>')

def view_post(post_id):
    posts = models.Post.select().where(models.Post.id == post_id)
    if posts.count() == 0:
        abort(404)
    return render_template('stream.html', stream=posts)

@app.route('/follow/<username>')
@login_required

def follow(username):
    try:
        to_user = models.User.get(models.User.username**username)
    except models.DoestNotExist:
        abort(404)
    else:
        try:
            models.Relationship.create(
                from_user=g.user._get_current_object(),
                to_user=to_user
            )
        except models.IntegrityError:
            pass
        else:
            flash("You're now following {}!".format(to_user.username), "Sucess")
    return redirect(url_for('stream', username=to_user.username))

@app.route('/unfollow/<username>')
@login_required


def unfollow(username):
    try:
        to_user = models.User.get(models.User.username**username)
    except models.DoestNotExist:
        abort(404)
    else:
        try:
            models.Relationship.get(
                from_user=g.user._get_current_object(),
                to_user=to_user
            ).delete_instance()
        except models.IntegrityError:
            pass
        else:
            flash("You've unfollowed {}!".format(to_user.username), "Sucess")
    return redirect(url_for('stream', username=to_user.username))

@app.errorhandler(404)

def not_found(error):
            return render_template('404.html'), 404

if __name__== '__main__':
    models.intialize()
    try:
        models.User.create_user(
            username='Alex',
            email='aajohnson2002@gmail.com',
            password='password',
            admin=True
            )
    except ValueError:
        pass
    app.run(debug=DEBUG, host=HOST, port=PORT)