Create model class in Scala with Play 2 Framework - scala

Question

I have a Play project, who contains a User model. Before, I used case class declaration with object declaration to access the model in my application. It works.
But now I want to declare a User class, to have multiple instances ; because I have understand that when you have a model with an object, it'as a singleton, so one instance.
And my project is a website which will have many users.
When I declare my class, as example :
class User(val username: String, var firstname: String, var lastname: String, var company: String, var password: String){}
The model isn't identified by my application (Application.scala)
How can I realise what I want ?
Old code :
case class User(username: String, password: String, firstname: String, lastname: String, company: String)
object User {
val simple = {
get[String]("username") ~
get[String]("password") ~
get[String]("firstname") ~
get[String]("lastname") ~
get[String]("company") map {
case username~password~firstname~lastname~company =>
User(username, password, firstname, lastname, company)
}
}
def findAll(): Seq[User] = {
DB.withConnection { implicit connection =>
SQL("SELECT * FROM user").as(User.simple *)
}
}
def create(user: User): Unit = {
DB.withConnection { implicit connection =>
SQL("INSERT INTO user(username, password, firstname, lastname, company) VALUES ({username}, {password}, {firstname}, {lastname}, {company})").on(
'username -> user.username,
'password -> user.password,
'firstname -> user.firstname,
'lastname -> user.lastname,
'company -> user.company
).executeUpdate()
}
}
def getOne(username: String): Option[User] = {
DB.withConnection { implicit connection =>
val selectUser = SQL("SELECT username, password, firstname, lastname, company FROM user where username={username}")
.on('username -> "azuken")()
.collectFirst {
case Row(username: String, password: String, firstname: String, lastname: String, company: String) =>
User(username, password, firstname, lastname, company)
case Row(username:String, password:String, firstname: String) =>
User(username, password, "bobby", "lqsdast", "sdf")
case _ =>
User("username", "password", "firstname", "lastname", "company")
}
selectUser
}
}
def authentication(username: String, password: String): Long = {
DB.withConnection { implicit connection =>
val firstRow = SQL("SELECT COUNT(*) AS NbRep FROM user WHERE username = {username} AND password = {password}").on(
'username -> username,
'password -> password
).apply().head
firstRow[Long]("NbRep")
}
}
}