diff --git a/install.sh b/install.sh
index 92441ef..bb806e8 100644
--- a/install.sh
+++ b/install.sh
@@ -119,12 +119,15 @@ IMAGE="${IMAGE_BASE}/${CUDA_VERSION}/tentacle:${IMAGE_TAG}"
 # -----------------------------
 # Registry login
 # -----------------------------
-echo
-read -rp "Registry username: " REG_USER
-read -rsp "Registry password or token: " REG_PASS
+REG_USER="krkn-registry"
+
+read -rsp "Registry access token: " REG_PASS
 echo
 
-echo "$REG_PASS" | docker login "$REGISTRY" -u "$REG_USER" --password-stdin
+echo "$REG_PASS" | docker login "$REGISTRY" -u "$REG_USER" --password-stdin || {
+  err "Docker login failed. Invalid token or registry unreachable."
+  exit 1
+}
 
 # -----------------------------
 # Prompt config