flask-accounts 0.1.1

Reusable Flask authentication module with registration, login, and email verification

Flask Accounts (Reusable Auth Module)

A modular, reusable Flask authentication system with:

• User registration
• Login / logout
• Email verification (with expiration + resend)
• Password hashing (Werkzeug)
• PostgreSQL backend
• Config-driven email (SMTP or terminal mode)

Designed to be plug-and-play in future Flask applications using:

from app.auth import init_auth
init_auth(app)

---

🚀 Quick Start

git clone https://github.com/GabeKL22/flask_accounts.git
cd flask_accounts

python -m venv venv
source venv/bin/activate

pip install -r requirements.txt

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⚙️ Configuration

Edit:

app/config.py

Set your values:

SECRET_KEY = "your-secret-key"

# PostgreSQL
DB_HOST = "localhost"
DB_NAME = "accountdb"
DB_USER = "accountuser"
DB_PASSWORD = "yourpassword"

# Email (SMTP)
SMTP_HOST = "smtp.gmail.com"
SMTP_PORT = 587
SMTP_USERNAME = "[e-mail]"
SMTP_PASSWORD = "your_app_password"
SMTP_FROM_EMAIL = "[e-mail]"

# Other useful configurations (UI)
LOGIN_REDIRECT = "home" # Must have a route defined
REGISTER_REDIRECT = "verify_email" # Must have a route defined
VERIFY_EMAIL_REDIRECT = "login" # Must have a route defined
LOGIN_BANNER = "Welcome Back"
LOGIN_BANNER_MSG = "Login to your account"
REGISTER_BANNER = "Create Account"
REGISTER_BANNER_MSG = "Register to get started"
CSS_STYLE_FILE = ""

# Dev mode
USE_TERMINAL_EMAIL = True

Dev Mode Behavior

Setting	Behavior
True	Prints verification code in terminal
False	Sends real email via SMTP

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🗄️ PostgreSQL Database Setup

1. Open PostgreSQL

sudo -u postgres psql

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2. Create database

CREATE DATABASE accountdb;

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3. Create user (optional but recommended)

CREATE USER accountuser WITH PASSWORD 'yourpassword';
ALTER ROLE accountuser SET client_encoding TO 'utf8';
ALTER ROLE accountuser SET default_transaction_isolation TO 'read committed';
ALTER ROLE accountuser SET timezone TO 'UTC';
GRANT ALL PRIVILEGES ON DATABASE accountdb TO accountuser;

---

4. Run schema

From your project root:

psql -U accountuser -d accountdb -f schema.sql

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▶️ Run the App

python run.py

Then open:

http://<ip>/auth/register

---

🔐 Authentication Flow

1. Register a new account
2. Receive verification code (terminal or email)
3. Verify email
4. Login
5. Access protected routes

---

📁 Project Structure

project/
│
├── run.py
├── requirements.txt
├── schema.sql
│
└── app/
    ├── __init__.py
    ├── config.py
    ├── db.py
    │
    └── auth/
        ├── __init__.py        # init_auth(app)
        ├── routes.py
        ├── service.py
        ├── validators.py
        ├── session.py
        │
        └── templates/
            └── auth/
                ├── login.html
                ├── register.html
                └── verify_email.html

---

🔌 Using This in Another Flask App

1. Copy module

Copy:

app/auth/
schema.sql

into your new project.

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1.1 PIP install module (from top directory)

pip install -e .

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2. Add required config

Your app must define:

SECRET_KEY
DB_HOST
DB_NAME
DB_USER
DB_PASSWORD
SMTP_HOST
SMTP_PORT
SMTP_USERNAME
SMTP_PASSWORD
SMTP_FROM_EMAIL
USE_TERMINAL_EMAIL

---

3. Initialize auth

from flask import Flask
from app.auth import init_auth

def create_app():
    app = Flask(__name__)
    app.config.from_object(Config)

    init_auth(app)

    return app

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4. Routes provided

• /auth/register
• /auth/login
• /auth/logout
• /auth/verify-email
• /auth/resend-code

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🧠 Example Protected Route

from flask import session, redirect, url_for

@app.route("/dashboard")
def dashboard():
    if "user_id" not in session:
        return redirect(url_for("auth.show_login"))
    return "Welcome to your dashboard"

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⚠️ Notes

• Uses session-based authentication (no JWT)
• Uses raw SQL via psycopg2
• Designed for extension into SaaS applications

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🚀 Future Improvements

• Password reset flow
• JWT / token-based auth
• OAuth (Google, GitHub)
• SQLAlchemy migration
• Packaging for pip install

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🧑‍💻 Author

Gabriel Leffew

📜 License

MIT License