let mergeUsers = (users: Array<UserBase>, additionalInfo) => {
  let res: Array<User> = [];
  for (let additionalUser of additionalInfo) {
    if (users.find(user => user.full_name === additionalUser.full_name) !== undefined) {
      let userToAdd: User = {
        gender: additionalUser.gender.charAt(0).toUpperCase() + additionalUser.gender.slice(1),
        title: additionalUser.title,
        full_name: additionalUser.name,
        city: additionalUser.city,
        state: additionalUser.state,
        country: additionalUser.country,
        postcode: Number(additionalUser.postcode),
        coordinates: additionalUser.coordinates,
        timezone: additionalUser.timezone,
        email: additionalUser.email,
        dob: additionalUser.b_day,
        age: additionalUser.age,
        phone: additionalUser.phone,
        picture_large: additionalUser.picture_large,
        picture_thumbnail: additionalUser.picture_thumbnail,
        id: additionalUser.id === undefined ? uuidv4() : additionalUser.id,
        favorite: additionalUser.favorite,
        course: additionalUser.course === undefined ? getRandomCourse() : additionalUser.course,
        bg_color: additionalUser.bg_color === undefined ? "#ffffff" : additionalUser.bg_color,
        note: additionalUser.note,
      }
      res.push(userToAdd);
    }
  }
  for (let user of users) {
    let details = additionalInfo.find(userDetails => user.full_name === userDetails.full_name);
    if (details !== undefined) {
      let userDetails: Details = {
        id: details.id,
        favorite: details.favorite === null ? false : details.favorite,
        course: details.course === null ? getRandomCourse() : details.course,
        bg_color: details.bg_color === null ? "#ffffff" : details.bg_color,
        note: details.note === null ? "" : details.note,
      }
      res.push({...user, ...userDetails });
    } else {
      let userDetails: Details = {
        id: uuidv4(),
        favorite: false,
        course: getRandomCourse(),
        bg_color: "#ffffff",
        note: "",
      }
      res.push({...user, ...userDetails });
    }
  }

  return res;
}