1. Authenticated User presses the upvote or downvote buttons (thumbs up or thumbs down under the bottom right corner of model visualizer) in the model’s page.
2. The system registers the vote and the model’s score is updated. The button corresponding to the user vote changes color to blue.

2.
    a. The Authenticated User had already voted for the model.
        1. The Authenticated User’s previous vote is modified