Add in auth however there are no restrictions currently

app.py

@@ -1,10 +1,12 @@
 from datetime import date
 import os
 from flask import Flask, abort, render_template, redirect, request, url_for
+from flask_login import LoginManager, current_user
 import jinja_partials
 from jinja2_fragments import render_block
 from decorators import validate_person, validate_topset, validate_workout
-from db import DataBase
+from routes.auth import auth, Person
+from extensions import db
 from utils import convert_str_to_date, generate_plot
 from flask_htmx import HTMX
 import minify_html
@@ -17,9 +19,23 @@ if os.environ.get('FLASK_ENV') != 'production':
 
 app = Flask(__name__)
 app.config.from_pyfile('config.py')
+app.secret_key = os.environ.get('SECRET_KEY', '2a661781919643cb8a5a8bc57642d99f')
 jinja_partials.register_extensions(app)
-db = DataBase(app)
 htmx = HTMX(app)
+login_manager = LoginManager(app)
+
+login_manager.login_view = 'auth.login'
+login_manager.login_message_category = 'info'
+
+@login_manager.user_loader
+def load_user(person_id):
+    row = db.execute("""SELECT person_id, name, email, password_hash from Person WHERE person_id=%s""", [person_id], one=True) 
+    if row:
+        return Person(row['person_id'], row['name'], row['email'], row['password_hash'])
+    return None
+
+app.register_blueprint(auth, url_prefix='/auth')
+
 
 
 @app.after_request
@@ -115,7 +131,6 @@ def person_overview(person_id):
     return render_template('person_overview.html', **render_args), 200, {"HX-Push-Url": url_for('person_overview', person_id=person_id, min_date=min_date, max_date=max_date, exercise_id=selected_exercise_ids), "HX-Trigger": "refreshStats"}
 
 @ app.route("/person/<int:person_id>/calendar")
-@ validate_person
 def get_calendar(person_id):
     selected_date = convert_str_to_date(request.args.get(
         'date'), '%Y-%m-%d') or date.today()