CheckUser function check if a user exists in the database according to his discord id.

CountScorePost function calculate the total score of a post according to the provided post (postRecord), it can also return the score of a specific user on this post according to the provided db id (userDbId).

GetDiscordId function get and return the user discord id according to the provided mongodb _id.

GetUserInfo function get and return all the user infos according to the provided mongodb _id.

GetVote function fetch and return all the information about a post according to the provided postId and userId.

The Post function check if post exist in the database according to his link.

RegisterUser register a user if it doesn't exist in the database using his discord id.

The SetVote function add or remove a like to post (set with the Post function) NOTE: it will return true if the vote has been added and false if not.