final stage of the app

app/routes/auth.py

@@ -0,0 +1,34 @@
+"""
+Authentication routes for QR Code Manager
+"""
+
+from flask import Blueprint, request, render_template, session, redirect, url_for, flash
+from app.utils.auth import get_admin_credentials, verify_password
+
+bp = Blueprint('auth', __name__)
+
+@bp.route('/login', methods=['GET', 'POST'])
+def login():
+    """Login page"""
+    if request.method == 'POST':
+        username = request.form.get('username')
+        password = request.form.get('password')
+        
+        admin_username, admin_password_hash = get_admin_credentials()
+        
+        if username == admin_username and verify_password(password, admin_password_hash):
+            session['logged_in'] = True
+            session['username'] = username
+            flash('Successfully logged in!', 'success')
+            return redirect(url_for('main.index'))
+        else:
+            flash('Invalid username or password!', 'error')
+    
+    return render_template('login.html')
+
+@bp.route('/logout')
+def logout():
+    """Logout and clear session"""
+    session.clear()
+    flash('You have been logged out!', 'info')
+    return redirect(url_for('auth.login'))