diff --git a/DNS-API-Dev-Guide.md b/DNS-API-Dev-Guide.md
index 222097c..6d6ed88 100644
--- a/DNS-API-Dev-Guide.md
+++ b/DNS-API-Dev-Guide.md
@@ -186,9 +186,9 @@ Your HTTP method call may require additional headers for Authorization, ContentT
 
 ```
 ...
-  myusername='admin@dnsprovider.com'
-  mypassword='secret_password'
-  mycredentials="$(printf "%s" "$MIAB_Username:$MIAB_Password" | _base64)"
+  myusername="$DNS_API_username"
+  mypassword="$DNS_API_password"
+  mycredentials="$(printf "%s" "$myusername:$mypassword" | _base64)"
 
   export _H1="Authorization: Basic $mycredentials"
   export _H2="ContentType: application/json"