Add admin template

app/routes.py

@@ -31,7 +31,7 @@ def register():
 @app.route('/login', methods=['GET', 'POST'])
 def login():
     if current_user.is_authenticated:
-        return redirect(url_for('index'))
+        return redirect(url_for('admin'))
     form = LoginForm()
     if form.validate_on_submit():
         user = User.query.filter_by(username=form.username.data).first()
@@ -46,7 +46,7 @@ def login():
 @app.route('/admin')
 @login_required
 def admin():
-    return "Hello, World!"
+    return render_template('admin.html')
 
 
 @app.route('/logout')

app/templates/admin.html

@@ -0,0 +1,5 @@
+{% extends "base.html" %}
+
+{% block content %}
+    <h1>Hi, {{ current_user.username }}!</h1>
+{% endblock %}