I've been working on a particular website project with a friend from an old job I had. We started with our idea, and are at the point of going through network security for the login information, but I'm not quite understanding how it all ties into the website and how encryption of usernames and passwords really work.
Now we're both busy on our respective portions, but this part was given to me as a matter of practicality I guess as I'm the one who has access to the root or something (If I understood it, I wouldn't be asking...). He's in charge of the programming for the website, and I for the administration and accounting for it from two separate locations where we use separate logins to a management portal for our pieces.
Now because I don't understand what he's looking to do or how to do it necessarily and he does, I've asked him to show me. After going through the process, it seemed like he was frustrated that it didn't immediately click for me. We ended that conversation with "we'll get back to this later...." in a bit of an upset tone. We had another session to go over it last week, but had the same result; I just don't get it. Whether it's the way he's teaching it or the way it's going into my head, it feels like I understand the concept but not the application.
He gets increasingly frustrated that he's for all intents and purposes explaining himself over and over without me getting it. We've been good friends for a long time, and I'd like to continue this friendship. I've asked if he wants to login and do it himself, but he says that he doesn't understand that part of the website management software and can't do it; he's vehement on not doing it and insists that I do. I've tried googling the information, but it's just as confusing there.
How can I ask him to just keep explaining it until I get it without him getting upset that I'm for all intents and purposes wasting his time?