old_contents: /**
   * Trim a full user object into a "public safe"
   * user object. The logic is housed here so when
   * the database grows more complex, we can manage
   * trimming a user in one place
   */
  module.exports = function(userAttributes) {
    return {
      "name": userAttributes.name,
      "username": userAttributes.username,
      "profile_picture": userAttributes.profile_picture,
      "last_active": userAttributes.last_active
    }
  }
new_contents: /**
   * Trim a full user object into a "public safe"
   * user object. The logic is housed here so when
   * the database grows more complex, we can manage
   * trimming a user in one place. This can even be
   * role-based trimming based off of the user attributes
   *
   * @param {Object} full list of user attributes from database
   * 
   * @return {Object} "trimmed" user object containing publically accessible attributes
   */
  module.exports = function(userAttributes) {
    return {
      "name": userAttributes.name,
      "username": userAttributes.username,
      "profile_picture": userAttributes.profile_picture,
      "last_active": userAttributes.last_active
    }
  }
subject: update docs on user trimming controller