My voting app (MEAN stack with angular material)

Here is my voting app:
Please take a look and tell me what you think.

i gotta say you really did a great job .
the ui is great
i didn’t like that when i’m authenticated and vote on an option , i can’t change my vote
and when i’m unauthenticated , i can post any number of votes i want
i.e. your app doesn’t have a way in identifying me (like my ip address for example)

other than that , everything is great . keep up the good work