diff --git a/pyproject.toml b/pyproject.toml
index 69a955f..ff60057 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,6 +7,7 @@ requires-python = "~=3.13.0"
 dependencies = [
     "alembic>=1.17.0",
     "fastapi[standard]>=0.116.0",
+    "python-dotenv>=1.1.1",
     "sqlalchemy>=2.0.44",
     "uvicorn[standard]>=0.35.0",
 ]
diff --git a/src/meal_manager/main.py b/src/meal_manager/main.py
index 59c926b..8df3280 100644
--- a/src/meal_manager/main.py
+++ b/src/meal_manager/main.py
@@ -1,10 +1,11 @@
 import locale
+import os
 from contextlib import asynccontextmanager
 from datetime import datetime, timedelta
 from typing import Annotated
 
 import starlette.status as status
-from fastapi import Depends, FastAPI, Request
+from fastapi import Depends, FastAPI, HTTPException, Request
 from fastapi.responses import RedirectResponse
 from fastapi.staticfiles import StaticFiles
 from fastapi.templating import Jinja2Templates
@@ -33,6 +34,15 @@ def get_session():
     with Session(engine) as session:
         yield session
 
+def get_user(request: Request) -> dict | None:
+    if os.environ.get("MEAL_MANAGER_FAKE_USER", False):
+        return {"username": "fake_user"}
+    if "ynh_user" in request.headers:
+        return {
+            "username": request.headers["ynh_user"],
+        }
+    else:
+        return None
 
 def create_db_and_tables():
     Base.metadata.create_all(engine)
@@ -51,9 +61,9 @@ templates = Jinja2Templates(directory="src/meal_manager/templates")
 
 SessionDep = Annotated[Session, Depends(get_session)]
 
-
+UserDep = Annotated[dict, Depends(get_user)]
 @app.get("/")
-async def index(request: Request, session: SessionDep):
+async def index(request: Request, session: SessionDep, user : UserDep):
     """Displays coming events and a button to register new ones"""
     now = datetime.now()
     # TODO: Once we refactored to use SQLAlchemy directly, we can probably do a nicer filtering on the date alone
@@ -66,7 +76,7 @@ async def index(request: Request, session: SessionDep):
     return templates.TemplateResponse(
         request=request,
         name="index.html",
-        context={"events": events, "current_page": "home", "now": now},
+        context={"events": events, "current_page": "home", "now": now, "user": user},
     )
 
 
@@ -155,7 +165,9 @@ async def delete_subscription(request: Request, session: SessionDep, household_i
 
 
 @app.get("/event/add")
-async def add_event_form(request: Request, session: SessionDep):
+async def add_event_form(request: Request, user: UserDep):
+    if not user:
+        raise HTTPException(status_code=401, detail="Only allowed for logged in users")
     return templates.TemplateResponse(request=request, name="add_event.html")
 
 
diff --git a/src/meal_manager/templates/index.html b/src/meal_manager/templates/index.html
index 7f67619..0adf9fe 100644
--- a/src/meal_manager/templates/index.html
+++ b/src/meal_manager/templates/index.html
@@ -3,9 +3,15 @@
 <div class="row mt-4 mb-3">
     <div class="col d-flex justify-content-between align-items-center">
         <h2>{% if current_page == "home" %}Kommende{% else %}Vergangene{% endif %} Kochabende</h2>
+        {% if user %}
         <a href="/event/add" class="btn btn-primary">
             <i class="bi bi-plus-circle"></i> Neues Event erstellen
         </a>
+        {% else %}
+        <button type="button" class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#exampleModal">
+            <i class="bi bi-plus-circle"></i> Neues Event erstellen
+        </button>
+        {% endif %}
     </div>
 </div>
 <div class="mb-4">
@@ -40,4 +46,24 @@
     </div>
 {% endfor %}
 </div>
-{% endblock %}
\ No newline at end of file
+
+<!-- Modal -->
+<div class="modal fade" id="exampleModal" tabindex="-1" aria-labelledby="exampleModalLabel" aria-hidden="true">
+  <div class="modal-dialog">
+    <div class="modal-content">
+      <div class="modal-header">
+        <h1 class="modal-title fs-5" id="exampleModalLabel">Bitte einloggen</h1>
+        <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
+      </div>
+      <div class="modal-body">
+          Einige Funktionen, wie das erstellen neuer Koch-Events, stehen nur zur Verfügung, wenn du in die Allmende-Cloud
+          eingeloggt bist. Gehe dazu auf <a href="https://cloud.allmende-gufi.de">cloud.allmende-gufi.de</a> und logge dich ein.
+      </div>
+      <div class="modal-footer">
+        <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Verstanden</button>
+      </div>
+    </div>
+  </div>
+</div>
+{% endblock %}
+
diff --git a/uv.lock b/uv.lock
index 9015dca..5c7b0cf 100644
--- a/uv.lock
+++ b/uv.lock
@@ -339,6 +339,7 @@ source = { editable = "." }
 dependencies = [
     { name = "alembic" },
     { name = "fastapi", extra = ["standard"] },
+    { name = "python-dotenv" },
     { name = "sqlalchemy" },
     { name = "uvicorn", extra = ["standard"] },
 ]
@@ -353,6 +354,7 @@ dev = [
 requires-dist = [
     { name = "alembic", specifier = ">=1.17.0" },
     { name = "fastapi", extras = ["standard"], specifier = ">=0.116.0" },
+    { name = "python-dotenv", specifier = ">=1.1.1" },
     { name = "sqlalchemy", specifier = ">=2.0.44" },
     { name = "uvicorn", extras = ["standard"], specifier = ">=0.35.0" },
 ]