diff --git a/dd-sso/admin/src/admin/auth/authentication.py b/dd-sso/admin/src/admin/auth/authentication.py
index dfc758e..f98c587 100644
--- a/dd-sso/admin/src/admin/auth/authentication.py
+++ b/dd-sso/admin/src/admin/auth/authentication.py
@@ -23,42 +23,42 @@ import os
 from flask_login import LoginManager, UserMixin
 
 from typing import TYPE_CHECKING, Dict
+
 if TYPE_CHECKING:
     from admin.flaskapp import AdminFlaskApp
 
-ram_users = {
-    os.environ["ADMINAPP_USER"]: {
-        "id": os.environ["ADMINAPP_USER"],
-        "password": os.environ["ADMINAPP_PASSWORD"],
-        "role": "manager",
-    },
-    os.environ["KEYCLOAK_USER"]: {
-        "id": os.environ["KEYCLOAK_USER"],
-        "password": os.environ["KEYCLOAK_PASSWORD"],
-        "role": "admin",
-    },
-    os.environ["WORDPRESS_MARIADB_USER"]: {
-        "id": os.environ["WORDPRESS_MARIADB_USER"],
-        "password": os.environ["WORDPRESS_MARIADB_PASSWORD"],
-        "role": "manager",
-    },
-}
+ram_users = {}
+
+for app, app_role in [
+    ("ADMINAPP", "manager"),
+    ("KEYCLOAK", "admin"),
+    ("WORDPRESS_MARIADB", "manager"),
+]:
+    k = f"{app}_USER"
+    if os.environ.get(k, ""):
+        pk = f"{app}_PASSWORD"
+        ram_users[os.environ[k]] = {
+            "id": os.environ[k],
+            "password": os.environ[pk],
+            "role": app_role,
+        }
 
 
 class User(UserMixin):
-    def __init__(self, id : str, password : str, role : str, active : bool = True) -> None:
+    def __init__(self, id: str, password: str, role: str, active: bool = True) -> None:
         self.id = id
         self.username = id
         self.password = password
         self.role = role
         self.active = active
 
-def setup_auth(app : "AdminFlaskApp") -> None:
+
+def setup_auth(app: "AdminFlaskApp") -> None:
     login_manager = LoginManager()
     login_manager.init_app(app)
     login_manager.login_view = "login"
 
     @login_manager.user_loader
-    def user_loader(username : str) -> User:
+    def user_loader(username: str) -> User:
         u = ram_users[username]
-        return User(id = u["id"], password = u["password"], role = u["role"])
+        return User(id=u["id"], password=u["password"], role=u["role"])
diff --git a/dd-sso/admin/src/admin/flaskapp.py b/dd-sso/admin/src/admin/flaskapp.py
index c200982..92c30cd 100644
--- a/dd-sso/admin/src/admin/flaskapp.py
+++ b/dd-sso/admin/src/admin/flaskapp.py
@@ -161,13 +161,13 @@ class AdminFlaskApp(Flask):
             # Move on with settings from the environment
             self.config.update({
                 "DOMAIN": self.domain,
-                "KEYCLOAK_POSTGRES_USER": os.environ["KEYCLOAK_DB_USER"],
-                "KEYCLOAK_POSTGRES_PASSWORD": os.environ["KEYCLOAK_DB_PASSWORD"],
-                "MOODLE_POSTGRES_USER": os.environ["MOODLE_POSTGRES_USER"],
-                "MOODLE_POSTGRES_PASSWORD": os.environ["MOODLE_POSTGRES_PASSWORD"],
-                "NEXTCLOUD_POSTGRES_USER": os.environ["NEXTCLOUD_POSTGRES_USER"],
-                "NEXTCLOUD_POSTGRES_PASSWORD": os.environ["NEXTCLOUD_POSTGRES_PASSWORD"],
-                "VERIFY": os.environ["VERIFY"] == "true",
+                "KEYCLOAK_POSTGRES_USER": os.environ.get("KEYCLOAK_DB_USER"),
+                "KEYCLOAK_POSTGRES_PASSWORD": os.environ.get("KEYCLOAK_DB_PASSWORD"),
+                "MOODLE_POSTGRES_USER": os.environ.get("MOODLE_POSTGRES_USER"),
+                "MOODLE_POSTGRES_PASSWORD": os.environ.get("MOODLE_POSTGRES_PASSWORD"),
+                "NEXTCLOUD_POSTGRES_USER": os.environ.get("NEXTCLOUD_POSTGRES_USER"),
+                "NEXTCLOUD_POSTGRES_PASSWORD": os.environ.get("NEXTCLOUD_POSTGRES_PASSWORD"),
+                "VERIFY": os.environ.get("VERIFY") == "true",
                 "API_SECRET": os.environ.get("API_SECRET"),
             })
         except Exception as e:
diff --git a/dd-sso/admin/src/admin/lib/admin.py b/dd-sso/admin/src/admin/lib/admin.py
index a7c6fee..f3c87e9 100644
--- a/dd-sso/admin/src/admin/lib/admin.py
+++ b/dd-sso/admin/src/admin/lib/admin.py
@@ -68,9 +68,9 @@ if TYPE_CHECKING:
     from admin.flaskapp import AdminFlaskApp
     from admin.lib.callbacks import ThirdPartyCallbacks
 
-MANAGER = os.environ["CUSTOM_ROLE_MANAGER"]
-TEACHER = os.environ["CUSTOM_ROLE_TEACHER"]
-STUDENT = os.environ["CUSTOM_ROLE_STUDENT"]
+MANAGER = os.environ.get("CUSTOM_ROLE_MANAGER", "manager")
+TEACHER = os.environ.get("CUSTOM_ROLE_TEACHER", "teacher")
+STUDENT = os.environ.get("CUSTOM_ROLE_STUDENT", "student")
 
 DDUser = Dict[str, Any]
 DDGroup = Dict[str, Any]
diff --git a/dd-sso/admin/src/admin/lib/keycloak_client.py b/dd-sso/admin/src/admin/lib/keycloak_client.py
index 75af0ba..313c3b0 100644
--- a/dd-sso/admin/src/admin/lib/keycloak_client.py
+++ b/dd-sso/admin/src/admin/lib/keycloak_client.py
@@ -57,8 +57,8 @@ class KeycloakClient:
     def __init__(
         self,
         url : str="http://dd-sso-keycloak:8080/auth/",
-        username : str=os.environ["KEYCLOAK_USER"],
-        password : str=os.environ["KEYCLOAK_PASSWORD"],
+        username : str=os.environ.get("KEYCLOAK_USER", ""),
+        password : str=os.environ.get("KEYCLOAK_PASSWORD", ""),
         realm : str="master",
         verify : bool=True,
     ) -> None:
@@ -71,8 +71,8 @@ class KeycloakClient:
         self.keycloak_pg = Postgres(
             "dd-apps-postgresql",
             "keycloak",
-            os.environ["KEYCLOAK_DB_USER"],
-            os.environ["KEYCLOAK_DB_PASSWORD"],
+            os.environ.get("KEYCLOAK_DB_USER", ""),
+            os.environ.get("KEYCLOAK_DB_PASSWORD", ""),
         )
 
     def connect(self) -> None:
diff --git a/dd-sso/admin/src/admin/lib/nextcloud.py b/dd-sso/admin/src/admin/lib/nextcloud.py
index 60ae6a9..763dcfd 100644
--- a/dd-sso/admin/src/admin/lib/nextcloud.py
+++ b/dd-sso/admin/src/admin/lib/nextcloud.py
@@ -51,8 +51,8 @@ class Nextcloud:
     def __init__(
         self,
         app : "AdminFlaskApp",
-        username : str=os.environ["NEXTCLOUD_ADMIN_USER"],
-        password : str=os.environ["NEXTCLOUD_ADMIN_PASSWORD"],
+        username : str=os.environ.get("NEXTCLOUD_ADMIN_USER", ""),
+        password : str=os.environ.get("NEXTCLOUD_ADMIN_PASSWORD", ""),
         verify : bool=True,
     ) -> None:
         url = "https://nextcloud." + app.config["DOMAIN"]