switch to flask_login, finish login implementation, add basic home page

app/routes/main.py

@@ -1,7 +1,22 @@
 from flask import Blueprint, render_template
+from flask_login import login_required, current_user
 
 main_bp = Blueprint("main", __name__)
 
+""" def login_required(view):
+    @wraps(view)
+    def wrapped_view(**kwargs):
+        if "user_id" not in session:
+            return redirect(url_for("auth.login"))
+        return view(**kwargs)
+    return wrapped_view
+     """
+
 @main_bp.route("/", methods=["GET", "POST"])
 def main():
-    return render_template("main.html")
+    return render_template("main.html")
+
+@main_bp.route("/home", methods=["GET", "POST"])
+@login_required
+def home():
+    return render_template("home.html", username=current_user.username)