diff --git a/README.md b/README.md
index 8620819..4cad6fe 100644
--- a/README.md
+++ b/README.md
@@ -205,6 +205,23 @@ Configure them in `config/withings_app.json`, for example:
 
 For the callback URL you will need to setup a webserver hosting `contrib/withings.html`.
 
+To do this in a Docker installation, you can use the environment variable `WITHINGS_APP` to point to a mounted `withings_app.json`
+
+Example docker-compose:
+```
+  withings-sync:
+    container_name: withings-sync
+    image: ghcr.io/jaroslawhartman/withings-sync:latest
+    volumes:
+      - "withings-sync:/root"
+      - "/etc/localtime:/etc/localtime:ro"
+    environment:
+      WITHINGS_APP: /root/withings_app.json
+(...)
+```
+You can then add the app-config in `withings-sync/withings_app.json`
+
+
 ### Run a periodic docker-compose cronjob
 
 We take the official docker image and override the entrypoint to crond.
diff --git a/withings_sync/withings2.py b/withings_sync/withings2.py
index 677bd60..3c2987e 100644
--- a/withings_sync/withings2.py
+++ b/withings_sync/withings2.py
@@ -67,8 +67,15 @@ def __init__(self):
                 self.user_config[
                     "authentification_code"
                 ] = self.get_authenticationcode()
+            try:
+                self.get_accesstoken()
+            except Exception as e:
+                log.warning("Could not get access-token. Trying to renew auth_code")
+                self.user_config[
+                    "authentification_code"
+                ] = self.get_authenticationcode()
+                self.get_accesstoken()
 
-            self.get_accesstoken()
 
         self.refresh_accesstoken()
 
@@ -142,6 +149,7 @@ def get_accesstoken(self):
                 "If it's regarding an invalid code, try to start the"
                 " script again to obtain a new link."
             )
+            raise
 
         self.user_config["access_token"] = body.get("access_token")
         self.user_config["refresh_token"] = body.get("refresh_token")