diff --git a/bluesky-telegram.sh b/bluesky-telegram.sh
index 4244b84..cf24d48 100644
--- a/bluesky-telegram.sh
+++ b/bluesky-telegram.sh
@@ -54,11 +54,12 @@ get_message() {
 
 # Retrieve token if missing
 while true; do
-    if [[ -z "${ACCESS_JWT}" ]]; then
-        echo "Token ist leer, erstelle Session."
-        create_session
-        break
-    fi
+   if [[ -z "${ACCESS_JWT}" ]] || [[ "${ACCESS_JWT}" == "null" ]]; then
+      echo "Token ist leer, erstelle Session."
+      create_session
+      break
+   fi
+   break
 done
 
 # Start function if provided as argument