How to properly use secondary constructors in Kotlin? Examples and syntax

Hi everyone! I just started learning Kotlin after Java and encountered a problem when creating classes with multiple constructors. In Java I used to do this: ```java public class User { private String name; private int age; public User(String name) { this.name = name; this.age = 0; } public User(String name, int age) { this.name = name; this.age = age; } } ``` But in Kotlin I see some strange syntax with the `constructor` keyword and a colon. I tried to write something similar: ```kotlin class User { var name: String = "" var age: Int = 0 constructor(name: String) { this.name = name } constructor(name: String, age: Int) { this.name = ```