diff --git a/auth.py b/auth.py
index 620ce75..4a2dbbb 100644
--- a/auth.py
+++ b/auth.py
@@ -94,6 +94,7 @@ def login():
 def register():
     if request.method == "POST":
         name = request.form["name"].strip()
+        group = request.form["group"]
         password = request.form["password"]
 
         existing_user = User.query.filter_by(name=name).first()
@@ -101,7 +102,7 @@ def register():
             return render_template("register.html", error="That name is already registered.")
 
         user = User(name=name)
-        group_id = user.set_group_id(password)
+        group_id = user.set_group_id(group)
         if group_id == 0:
             return render_template("register.html", error="Unknown registration key.")
 
diff --git a/groups.py b/groups.py
new file mode 100644
index 0000000..d8b85ee
--- /dev/null
+++ b/groups.py
@@ -0,0 +1,28 @@
+from flask import Blueprint, render_template, request
+from models import db
+from models import Group
+from flask_login import login_required, current_user
+
+groups_bp = Blueprint("groups", __name__)
+
+@groups_bp.route("/groups", methods=["GET", "POST"])
+@login_required
+def groups():
+    if not current_user.is_admin:
+        return "Forbidden", 403
+    error = ""
+
+    if request.method == "POST":
+        secret = request.form["secret"].strip()
+        if not secret:
+            error = "Group secret is required."
+        elif Group.query.filter_by(secret=secret).first():
+            error = "That group already exists."
+        else:
+            group = Group(secret=secret)
+            db.session.add(group)
+            db.session.commit()
+
+    return render_template("groups.html",
+                           groups=Group.query.order_by(Group.id).all(),
+                           error=error)
diff --git a/initialize_data.py b/initialize_data.py
index e64a954..9a7691f 100644
--- a/initialize_data.py
+++ b/initialize_data.py
@@ -1,6 +1,6 @@
 from lapp import create_app
 import sqlalchemy as sa
-from models import db, User, ListOfItems, Shared, Item
+from models import db, User, ListOfItems, Shared, Item, Group
 
 if __name__ == "__main__":
     app = create_app()
@@ -9,10 +9,14 @@ if __name__ == "__main__":
     users = db.session.scalars(query).all()
     print(users)
     if len(users) == 0:
-        admin = User(name="admin", is_admin=True, is_approved=True, is_private=True)
+        g = Group(secret="This is the group just for the admin")
+        db.session.add(g)
+        g = Group(secret="GroupForIgnaceAndLoversThatDoGroceries")
+        db.session.add(g)
+        admin = User(name="admin", group_id=1, is_admin=True, is_approved=True, is_private=True)
         admin.set_password("suy2025")
         db.session.add(admin)
-        user1 = User(name="ignace", is_admin=False, is_approved=True)
+        user1 = User(name="ignace", group_id=2, is_admin=False, is_approved=True)
         user1.set_password("xanderj2")
         db.session.add(user1)
         db.session.commit()
diff --git a/lapp.py b/lapp.py
index 9f5a9ed..18fe530 100644
--- a/lapp.py
+++ b/lapp.py
@@ -7,6 +7,7 @@ from admin import admin_bp
 from lists import lists_bp
 from items import items_bp
 from api import api_bp
+from groups import groups_bp
 
 login_manager = LoginManager()
 
@@ -24,6 +25,7 @@ def create_app():
     app.register_blueprint(lists_bp)
     app.register_blueprint(items_bp)
     app.register_blueprint(api_bp)
+    app.register_blueprint(groups_bp)
 
     with app.app_context():
         db.create_all()
diff --git a/show_db.py b/show_db.py
new file mode 100644
index 0000000..288c50b
--- /dev/null
+++ b/show_db.py
@@ -0,0 +1,84 @@
+from lapp import create_app
+from models import db
+from models import Group, Item, ListOfItems, Shared, User
+
+
+def print_section(title):
+    print()
+    print("=" * len(title))
+    print(title)
+    print("=" * len(title))
+
+
+def print_model_rows(model, columns):
+    primary_key = next(iter(model.__table__.primary_key.columns))
+    rows = model.query.order_by(primary_key).all()
+    if not rows:
+        print("(empty)")
+        return
+
+    for row in rows:
+        values = []
+        for column in columns:
+            values.append(f"{column}={getattr(row, column)!r}")
+        print(", ".join(values))
+
+
+def main():
+    app = create_app()
+    with app.app_context():
+        print(f"Database: {app.config['SQLALCHEMY_DATABASE_URI']}")
+
+        print_section("Users")
+        print_model_rows(User, [
+            "id",
+            "updated_at",
+            "group_id",
+            "name",
+            "password_hash",
+            "is_admin",
+            "is_approved",
+            "is_private",
+            "is_guest",
+        ])
+
+        print_section("Groups")
+        print_model_rows(Group, [
+            "id",
+            "updated_at",
+            "secret",
+        ])
+
+        print_section("Lists")
+        print_model_rows(ListOfItems, [
+            "id",
+            "updated_at",
+            "owner_user_id",
+            "name",
+            "is_active",
+        ])
+
+        print_section("Items")
+        print_model_rows(Item, [
+            "id",
+            "updated_at",
+            "listofitems_id",
+            "label",
+            "quantity",
+            "unit",
+            "label_alt1",
+            "label_alt2",
+            "is_checked",
+            "is_suggestion",
+            "category",
+        ])
+
+        print_section("Shares")
+        print_model_rows(Shared, [
+            "user_id",
+            "listofitem_id",
+        ])
+
+
+if __name__ == "__main__":
+    main()
diff --git a/templates/groups.html b/templates/groups.html
new file mode 100644
index 0000000..6083517
--- /dev/null
+++ b/templates/groups.html
@@ -0,0 +1,27 @@
+{% extends "base.html" %}
+{% block content %}
+<h4 class="mb-4">Groups</h4>
+
+{% if error %}
+<div class="alert alert-danger" role="alert">
+  {{ error }}
+</div>
+{% endif %}
+
+<form method="post" class="mb-4">
+  <div class="d-flex justify-content-between">
+    <input class="form-control" name="secret" placeholder="Group secret" required>
+    &nbsp;
+    <button class="btn btn-success">+</button>
+  </div>
+</form>
+
+<ul class="list-group">
+  {% for group in groups %}
+  <li class="list-group-item">
+    <div class="fw-semibold">Group {{ group.id }}</div>
+    <div class="text-muted small">{{ group.secret }}</div>
+  </li>
+  {% endfor %}
+</ul>
+{% endblock %}
diff --git a/templates/register.html b/templates/register.html
index 2d06ea1..94c5c68 100644
--- a/templates/register.html
+++ b/templates/register.html
@@ -8,6 +8,7 @@
 {% endif %}
 <form method="post">
   <input class="form-control mb-3" name="name" placeholder="New Name" required>
+  <input class="form-control mb-3" name="group" type="password" placeholder="Existing Group" required>
   <input class="form-control mb-3" name="password" type="password" placeholder="New Password" required>
     <input
     type="image"