Untitled

# app.py

from flask import Flask, request, render_template, redirect, url_for
from flask_sqlalchemy import SQLAlchemy
from werkzeug.security import generate_password_hash, check_password_hash

app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///users.db'
db = SQLAlchemy(app)

class User(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(80), unique=True, nullable=False)
    email = db.Column(db.String(120), unique=True, nullable=False)
    password = db.Column(db.String(120), nullable=False)

    def __init__(self, username, email, password):
        self.username = username
        self.email = email
        self.password = generate_password_hash(password)

@app.route('/')
def index():
    return render_template('index.html')

@app.route('/signup', methods=['GET', 'POST'])
def signup():
    if request.method == 'POST':
        username = request.form['username']
        email = request.form['email']
        password = request.form['password']

        user = User(username=username, email=email, password=password)
        db.session.add(user)
        db.session.commit()

        return redirect(url_for('login'))

    return render_template('signup.html')

@app.route('/login', methods=['GET', 'POST'])
def login():
    if request.method == 'POST':
        email = request.form['email']
        password = request.form['password']

        user = User.query.filter_by(email=email).first()

        if user and check_password_hash(user.password, password):
            return redirect(url_for('dashboard'))
        else:
            return 'Invalid email or password'

    return render_template('login.html')

@app.route('/dashboard')
def dashboard():
    return 'Welcome to the dashboard'

if __name__ == '__main__':
    db.create_all()
    app.run(debug=True)


<!-- templates/index.html -->

<h1>Welcome to the app</h1>
<a href="{{ url_for('signup') }}">Sign Up</a>
<a href="{{ url_for('login') }}">Login</a>


<!-- templates/signup.html -->

<h1>Sign Up</h1>
<form action="{{ url_for('signup') }}" method="post">
    <label for="username">Username:</label>
    <input type="text" name="username" id="username">

    <label for="email">Email:</label>
    <input type="email" name="email"