README: add admincreds invocation
diff --git a/README b/README
index a9bed37..b22c332 100644
--- a/README
+++ b/README
@@ -10,4 +10,5 @@
     . env.sh # setup PATH and hscloud_root
     tools/install.sh # build tools
 
+    clustercfg admincreds $(whoami)-admin # get administrative creds (valid for 5 days)
     kubectl version