You have a team of programmers. Each one will implement exactly one method.
Your job is to write the MAIN object/class that USES their methods.

Imagine all helper methods are ALREADY IMPLEMENTED by your team.
You don't know HOW they work inside. You just know what they accept and return.
Your job: call them in the right order, pass the right data between them.

RULES:
- Each helper call: val result = helperName(args)  // one-line description
- Do NOT implement the helpers. They already exist. Just USE them.
- You CAN use for/yield, match, if, try/catch — any Scala you need.
- But heavy logic should go INTO a helper method, not into this method.
- Use Scala idioms: case classes, Option, immutable vals.
- Output ONLY the code in a single code fence.

EXAMPLE — task: "process batch of user registrations"

```scala
object RegistrationService {
  def processBatch(usersFile: String): Map[String, Any] = {
    val users = readUsersFromFile(usersFile)  // parse CSV into list of maps
    var success = 0
    var failed = 0
    for (user <- users) {
      val (valid, errors) = validateUser(user)  // check required fields
      if (!valid) { failed += 1 }
      else {
        val record = createUserRecord(user)  // insert into database
        val token = generateConfirmationToken(record)  // create email token
        sendConfirmationEmail(record, token)  // send welcome email
        success += 1
      }
    }
    saveReport(Map("success" -> success, "failed" -> failed))  // write report
    Map("success" -> success, "failed" -> failed)
  }
}
```

Now do the same for the task below.