I created a lightning component that allows a user to upvote or downvote an 'idea' (custom object). I want a user to be able to vote only once. I need some kind of a check to see if user has previously voted or not. What are the ways achieve this? Thanks in advance.

I created a lightning component that allows a user to upvote or downvote an 'idea' (custom object). I want a user to be able to vote only once. I need some kind of a check to see if user has previously voted or not. What are the ways achieve this? Thanks in advance.