Update Password protect instance with nginx

Password-protect-instance-with-nginx.md

@@ -12,6 +12,12 @@ Generate password file and add user1 - you will be prompted for the password to
 sudo htpasswd -c /etc/nginx/.htpasswd user1
 ```
 
+To add another user, run the same command but omit the -c. Example:
+
+```
+sudo htpasswd /etc/nginx/.htpasswd user2
+```
+
 Modify the site's configuration file. We have used default in other areas of the wiki, but your own may vary
 
 ```