Extract record details to another page from firebase

There is this tutorial where you can get the user’s details to a page, using the api. I did it, it works amazingly.

I tried to do the same with the api from my firebase’ database, and it work, but just half of it

it gets the data on the first page, where there are all the option/documents.

No i want to clic one of them and get the details of that specific person, however

it does not work, it shows only the first person or sometimes it shows blank.

there is something I’m not doing or doing wrong.

Really hope someone can help me

Maybe this will help, its a video on saving user specific data.