feat(users): adds login functionality

app/users/routes.py

@@ -2,13 +2,19 @@ from flask import redirect, request, render_template, session
 from app.services.user_service import UserService
 from app.users import bp
 from app.utils.form_errors_dict import FORM_ERRORS
+from app.utils.helpers import login_required
+
 @bp.route('/')
+@login_required
 def index():
     return render_template("users/index.html")
 
-@bp.route('/login')
+@bp.route('/login', methods=["GET", "POST"])
 def login():
-    return render_template("users/login.html")
+    if request.method == 'POST':
+        if UserService.login(request.form):
+           return redirect("/")
+    return render_template("users/login.html", FORM_ERRORS=FORM_ERRORS)
 
 @bp.route('/logout')
 def logout():