reactive mongo without play

MongoDb.scala

package models

import com.typesafe.config.ConfigFactory
import reactivemongo.api.{DefaultDB, DB, MongoDriver}
import akka.event.slf4j.Logger
import reactivemongo.api.collections.default.BSONCollection
import scala.util.Try

object MongoDb {
  private val logger = Logger("MongoDB")
    
  private val config = ConfigFactory.load
  private val server = config.getString("mongodb.server")
  private val dbName = config.getString("mongodb.db")

  private val driver = new MongoDriver
  private val db = DB(dbName, driver.connection(List(server)))

  def getCollection(name: String): BSONCollection = db(name)
}

User.scala

package models

import ua.t3hnar.bcrypt.Password
import reactivemongo.bson._
import DefaultBSONHandlers._
import scala.concurrent.ExecutionContext.Implicits.global
import concurrent.Future

case class User(username: String, password: String) {
  def checkPassword(cleartext: String): Boolean =
    cleartext isBcrypted password
}

object User {

lazy val collection = MongoDb.getCollection("users")

  implicit val userFormat = Macros.handler[User]

  def find(username: String): Future[Option[User]] = {
    val query = BSONDocument("username" -> username)
    collection.find(query).one[User]
  }

  def create(username: String, passwordClearText: String): Future[User] = {
    val user = User(username, passwordClearText.bcrypt)
    collection insert user map { error =>
      if(error.ok)
        user
      else
        throw error
    }
  }
}