Every UniKit has a code on the lid. Scanning it is the quickest way in — but if the label is worn, or you are not holding the kit, you can type the code instead.
Your phone's own camera app reads it — there is no UniKit app to install and you do not need an account to look inside a kit.
Bottom right of the lid label, under the serial number.
Dashes and capitals do not matter. A pasted kit link works too.
FAK-000123 is the serial. The code you want is the shorter one under it, in two blocks of four.
The pharmacy that packed the kit can look it up from the serial and print a new label. If you have signed in before, your kits are on My kits.
Have not got a kit yet? Design one for your household and the pharmacy makes it up.