Enable users to give feedback on the validity of the contact information.

Use case : A user calls the phone number of the elected official, gets in contact & exchanges. The user "upvotes" the phone number expressing that it was valid. Another user comes on the page and sees that the phone number was upvoted x times

Rules :

• A user has 1 vote per field
• A user can change his vote in time. Example : Called the number 2 months ago and upvoted, tried it again today didn't work, the user can change the previous upvote to a downvote.

Fields on which users can vote :

• Phone numbers
• Email address