How to convert a JSON object to a TypeScript class instance?

Hello everyone! I'm new to TypeScript and encountered a problem when working with JSON data. I have a User class with fields and methods: ```typescript class User { name: string; age: number; email: string; constructor(name: string, age: number, email: string) { this.name = name; this.age = age; this.email = email; } isAdult(): boolean { return this.age >= 18; } } ``` When I receive data from the server in JSON format, for example via fetch: ```typescript const response = await fetch('/api/user'); const jsonData = await response.json(); // jsonData = { name: 'Ivan', age: 25, email: 'ivan@example.com' } ``` I try to cast it to the User type: ```typescript const user: User = jsonData as User; ``` But then, when I call the method u