CAF1 Layout URL to access Dell Boomi

We are trying to create access to a BOOMi URL that will show all X12 Transactions for a PO. We are still in the POC phase of this. The screen shot will show the URL where we are mapping the PO Number to the URL. During the POC phase we are just using a basic_auth string in the url just to see if it connects.

The first time it is prompting for a Userid and Password. which we were hoping that the basic_auth string would keep that from happening. After the first time we entered the userid and password it doesn't ask for it again and works great, but if we close the session and cache clears it will make us enter it again. My question has anyone else done something like this and help put us in the right direction. Appreciate the help