Configuration code snippet

application.conf

database {
  username = "josh"
  password = "password"
}

api {
  url = "www.josh.com"
  port = "8080"
}

Configuration.scala

import com.typesafe.config.{ConfigFactory, Config}

trait Configuration {
  val config: Config = ConfigFactory.load()
}

trait Configured[+C <: Configuration] {
  def configuration: C
}

trait DatabaseConfiguration extends Configuration {
  object databaseObject {
    private val databaseConfig = config.getConfig("database")
    val username = config.getString("username")
    val password = config.getString("password")
  }
}

trait ApiConfiguration extends Configuration {
  object apiObject {
    private val apiConfig = config.getConfig("api")
    val url = config.getString("url")
    val port = config.getString("port")
  }
}

trait MainConfiguration extends ApiConfiguration with DatabaseConfiguration {
  val version = "3.1.2"
}

class DatabaseClass extends Configured[DatabaseConfiguration] {
  override val configuration = new DatabaseConfiguration {}
  
  val theDatabaseUsername = configuration.database.username
}

class ApiClass extends Configured[ApiConfiguration] {
  override val configuration = new ApiConfiguration {}
  
  val apiPort = configuration.api.port
}

class HasDatabaseAndApi extends Configured[MainConfiguration] {
  
  override val configuration = new MainApplicationConfiguration {}
  val config = configuration
  
  val apiPort = configuration.api.port
  val theDatabaseUsername = configuration.database.username
  val version = configuration.version
  
  val databaseClass = new DatabaseClass {
    override val configuration = config
  }
  val apiClass = new ApiClass {
    override val configuration = config
  }
}