first commit

app/auth.py

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+from flask import Blueprint, render_template, request, redirect, url_for, flash
+from flask_login import login_user, logout_user, login_required
+from .models import User
+
+auth = Blueprint("auth", __name__)
+
+@auth.route("/login", methods=["GET", "POST"])
+def login():
+    if request.method == "POST":
+        user = User.query.filter_by(email=request.form["email"].strip().lower()).first()
+        if user and user.check_password(request.form["password"]):
+            login_user(user); return redirect(url_for("main.dashboard"))
+        flash("Nieprawidłowy e-mail lub hasło", "danger")
+    return render_template("login.html")
+
+@auth.route("/logout")
+@login_required
+def logout():
+    logout_user(); return redirect(url_for("auth.login"))