module.exports = async function(pg, users) {
  let adminUser

  for (const user of users) {
    const existing = await pg.user.findByEmail(user.email)

    if(existing) {
      console.warn("  Warning: duplicate user with email " + user.email)
      continue;
    }

    const newUser = await pg.user.import(user.email, user.password);

    if (user.emailConfirmed) {
      await pg.user.markEmailVerified(newUser.uuid)
    }

    if (user.isAdmin) {
      await pg.user.makeAdmin(newUser.uuid)
    }

    if (user.isAdmin && !adminUser) {
      adminUser = newUser;
    }

    const creationDate = new Date(parseInt(user._id.toString().slice(0,8), 16)*1000)
    await pg.user.updateRegistrationDate(newUser.uuid, creationDate, user.emailConfirmed)
  }

  if (!adminUser) {
    throw new Error("Unable to find importing admin")
  }

  return adminUser
}