If you created the uSHOW page, a unique URL will show at the end of the process and the same URL will be emailed to you. If someone else created the URL, she will have to send it to you.
If you created an invitation code, anyone who accesses the URL will have to enter the code once while logged into a uGRIDD account. After correctly entering the code once, that account can view the uSHOW page freely.