Implement support for password change and logout

Note the hack.

snikket_web/__init__.py

@@ -1,32 +1,38 @@
+import quart.flask_patch
+
 from quart import Quart, session, request, render_template, redirect, url_for
 
-from . import prosodyclient
+from .prosodyclient import client
 
 app = Quart(__name__)
 app.config.from_envvar("SNIKKET_WEB_CONFIG")
 
-client = prosodyclient.ProsodyClient(app)
+client.init_app(app)
 client.default_login_redirect = "login"
 
 
-@app.route("/", methods=["GET", "POST"])
+@app.route("/login", methods=["GET", "POST"])
 async def login():
     if client.has_session:
-        return redirect(url_for('home'))
+        return redirect(url_for('user.index'))
 
     if request.method == "POST":
         form = await request.form
         jid = form["address"]
         password = form["password"]
         await client.login(jid, password)
-        return redirect(url_for('home'))
+        return redirect(url_for('user.index'))
 
     return await render_template("login.html")
 
 
-@app.route('/home')
-@client.require_session()
+@app.route("/")
 async def home():
-    user_info = await client.get_user_info()
+    if client.has_session:
+        return redirect(url_for('user.index'))
 
-    return await render_template("home.html", user_info=user_info)
+    return redirect(url_for('login'))
+
+
+from .user import user_bp
+app.register_blueprint(user_bp)