diff --git a/entrypoint.sh b/entrypoint.sh
index d06d3b9..b7b7193 100644
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -4,4 +4,10 @@ set -eu
 
 #echo $1
 
+if [ -z "$1" ]
+  then
+    echo "No token supplied"
+    exit
+fi
+
 bash <(curl -s https://codecov.io/bash) -t $1
\ No newline at end of file