User class after migrated to Kotlin

User.kt

class User {

    var userId: String? = null
    var email: String? = null
    var userName: String? = null
    var name: String? = null
    var phNumber: String? = null
    var country: String? = null
    var profilePic: String? = null

    override fun equals(o: Any?): Boolean {
        if (this === o) return true
        if (o == null || javaClass != o.javaClass) return false

        val that = o as UserSample?

        if (if (userId != null) userId != that!!.userId else that!!.userId != null) return false
        if (if (email != null) email != that.email else that.email != null) return false
        if (if (userName != null) userName != that.userName else that.userName != null)
            return false
        if (if (name != null) name != that.name else that.name != null) return false
        if (if (phNumber != null) phNumber != that.phNumber else that.phNumber != null)
            return false
        if (if (country != null) country != that.country else that.country != null) return false
        return if (profilePic != null) profilePic == that.profilePic else that.profilePic == null
    }

    override fun hashCode(): Int {
        var result = if (userId != null) userId!!.hashCode() else 0
        result = 31 * result + if (email != null) email!!.hashCode() else 0
        result = 31 * result + if (userName != null) userName!!.hashCode() else 0
        result = 31 * result + if (name != null) name!!.hashCode() else 0
        result = 31 * result + if (phNumber != null) phNumber!!.hashCode() else 0
        result = 31 * result + if (country != null) country!!.hashCode() else 0
        result = 31 * result + if (profilePic != null) profilePic!!.hashCode() else 0
        return result
    }

    override fun toString(): String {
        return "UserSample{" +
                "userId='" + userId + '\'' +
                ", email='" + email + '\'' +
                ", userName='" + userName + '\'' +
                ", name='" + name + '\'' +
                ", phNumber='" + phNumber + '\'' +
                ", country='" + country + '\'' +
                ", profilePic='" + profilePic + '\'' +
                '}'
    }
}