App specific password on Mac & Device

Hi

I generated an app specific password on my Mac and then downloaded the app version for my iphone. But of course I don't know what the app specific password is because it's not saved anywhere. I did look in keychain but under 'show password' is says 'signed App Token' and then a string of characters which certainly weren't the original password. So how do I retrieve it? Or do I have to reset it again so that I can write it down and input it manually into the device app too? Clearly Apple are trying to make this as complicated as possible because it's not possible to set my own app specific password!

Thanks for any help

WG