Tests Passed, yet on submission it throws the message "Bummer! Try Again"

from flask import Flask, g, render_template, flash, redirect, url_for
from flask_bcrypt import check_password_hash
from flask_login import (LoginManager, login_user,
                             logout_user, login_required, current_user)

import forms
import models

DEBUG = True
PORT = 8000
HOST = '0.0.0.0'

app = Flask(__name__)
app.secret_key = 'youdontknowmysecretkey'

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.DoesNotExist:
        return None

@app.before_request
def before_request():
    """Connect to the database before each request."""
    g.db = models.db
    g.db.get_conn()
    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.SignUpForm()
    if form.validate_on_submit():
        flash("Yay, you registered!", "success")
        models.User.create_user(
          email = form.email.data,
          password = form.password.data
        )
        return redirect(url_for('index'))
    return render_template('register.html', form=form)

@app.route('/login', methods=('GET', 'POST'))
def login():
    form = forms.LoginForm()
    if form.validate_on_submit():
        try:
            user = models.User.get(models.User.email == form.email.data)
        except models.DoesNotExist:
            flash("Email is incompatible", "error")
        else:
            if check_password_hash(user.password, form.password.data):
                login_user(user)
                flash("You are logged in", "success")
                return redirect(url_for('index'))
            else:
                flash("Password does not match", "error")
    return render_template('login.html', form=form)

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

@app.route('/taco', methods=('GET','POST'))
@login_required
def taco():
    form = forms.TacoForm()
    if form.validate_on_submit():
        models.Taco.create(user = g.user._get_current_object(),
                           protein = form.protein.data,
                           shell = form.shell.data,
                           cheese = form.cheese.data,
                           extras = form.extras.data.strip()
                          )
        flash("Your taco has been added!!", "success")
        return redirect(url_for('index'))
    return render_template('taco.html', form=form)


@app.route('/')
def index():
    try:
        user = g.user
        tacos = user.get_tacos()
        return render_template('index.html', tacos=tacos)
    except:
        return render_template('index.html', tacos=None)

if __name__== '__main__':
    models.initialize()
    try:
        with models.db.transaction():
            models.User.create_user(
              email = 'billy@example.com',
              password = 'password'
            )
    except ValueError:
        pass
#app.run(debug=DEBUG, host=HOST, port=PORT)

from flask_login import UserMixin
from flask_bcrypt import generate_password_hash

from peewee import *

db = SqliteDatabase('tacos.db')

class User(UserMixin, Model):
    email = CharField(unique=True)
    password = CharField(max_length=100)

    class Meta:
        database = db

    def get_tacos(self):
        return Taco.select().where(Taco.user == self)

    def get_stream(self):
        return Taco.select().where(
            (Taco.user == self)
        )

    @classmethod
    def create_user(cls, email, password):
        try:
            cls.create(
                email = email,
                password = generate_password_hash(password))
        except IntegrityError:
            raise ValueError("User already exists")

class Taco(Model):
    protein = CharField()
    shell = CharField()
    cheese = BooleanField(default=True)
    extras = TextField()
    user = ForeignKeyField(
        rel_model = User,
        related_name = 'tacos'
    )

    class Meta:
        database = db


def initialize():
    db.connect()
    db.create_tables([User, Taco], safe=True)
    db.close()

from flask_wtf import FlaskForm
from wtforms import StringField, PasswordField, TextAreaField, BooleanField
from wtforms.validators import (DataRequired, Regexp, ValidationError, Email,
                               Length, EqualTo)

from models import User

def email_exists(form, field):
    if User.select().where(User.email == field.data).exists():
        raise ValidationError('User with that email already exists.')

class SignUpForm(FlaskForm):
    email = StringField(
        'Email',
        validators=[
            DataRequired(),
            Email(),
            email_exists
        ])
    password = PasswordField(
        'Password',
        validators=[
            DataRequired(),
            Length(min=2),
            EqualTo('password2', message='Passwords must match')
        ])
    password2 = PasswordField(
        'Confirm Password',
        validators=[DataRequired()]
    )

class LoginForm(FlaskForm):
    email = StringField(
        'Email',
        validators=[
            DataRequired(),
            Email()
        ])
    password = PasswordField(
        'Password',
        validators=[
            DataRequired(),
        ])

class TacoForm(FlaskForm):
    protein = StringField('proteins', validators=[DataRequired()])
    shell = StringField('shell', validators=[DataRequired()])
    cheese = BooleanField('cheese?', validators=[DataRequired()])       
    extras = StringField('extras')