Peewee database OperationalError

from flask import (Flask, g, render_template, flash, redirect, url_for)
from flask_login import LoginManager

import forms
import models

app = Flask(__name__)
app.secret_key = "drtgrfedwfoklmrefkp[slwmergkpfdwqklerd"

login_manager = LoginManager(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.DATABASE
    g.db.connect()

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


@app.route('/register', methods=('GET', 'POST'))
def register():
    form = forms.RegistrationForm()
    if form.validate_on_submit():
        flash("Registration complete", "success")
        models.User.create_user(
            username=form.username.data,
            email = form.password.data,
            password = form.password.data
        )
        return redirect(url_for('index'))
    return render_template('registration.html', form=form)


@app.route('/')
def index():
    return 'Index Page'


if __name__ == '__main__':
    models.initialize()

    try:
        models.User.create_user(
            username='abruce',
            email='abruce1711@gmail.com',
            password='password',
            admin=True
        )
    except ValueError:
        pass
    app.run(debug=True, host="0.0.0.0")

import datetime

from flask_login import UserMixin
from flask_bcrypt import generate_password_hash, check_password_hash
from peewee import *


DATABASE = SqliteDatabase('social.db')


class User(UserMixin, Model):
    username = CharField(unique=True)
    email = CharField(unique=True)
    password = CharField(max_length=100)
    joined_at = DateTimeField(default=datetime.datetime.now)
    is_admin = BooleanField(default=False)

    class Meta:
        database = DATABASE
        order_by = ('-joined_at',)

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


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