added client RA bill wise download report

app/routes/auth.py

@@ -0,0 +1,48 @@
+from flask import Blueprint, render_template, request, redirect, url_for, flash, session
+from app.services.user_service import UserService
+
+auth_bp = Blueprint("auth", __name__)
+
+@auth_bp.route("/login", methods=["GET", "POST"])
+def login():
+    if session.get("user_id"):
+        return redirect(url_for("dashboard.dashboard"))
+
+    if request.method == "POST":
+        email = request.form.get("email")
+        password = request.form.get("password")
+
+        user = UserService.validate_login(email, password)
+        if user:
+            session["user_id"] = user.id
+            session["user_name"] = user.name
+            flash("Login successful", "success")
+            return redirect(url_for("dashboard.dashboard"))
+
+        flash("Invalid email or password", "danger")
+
+    return render_template("login.html", title="Login")
+
+
+@auth_bp.route("/logout")
+def logout():
+    session.clear()
+    flash("Logged out successfully", "info")
+    return redirect(url_for("auth.login"))
+
+@auth_bp.route("/register", methods=["GET", "POST"])
+def register():
+    if request.method == "POST":
+        name = request.form.get("name")
+        email = request.form.get("email")
+        password = request.form.get("password")
+
+        user = UserService.register_user(name, email, password)
+        if not user:
+            flash("Email already exists", "danger")
+            return redirect(url_for("auth.register"))
+
+        flash("User registered successfully", "success")
+        return redirect(url_for("auth.login"))
+
+    return render_template("register.html", title="Register")