How to create an object based on a TypeScript interface? Correct ways

Hello everyone! I recently started learning TypeScript and ran into a problem. I have an interface for describing a user: ```typescript interface User { id: number; name: string; email: string; age?: number; } ``` Now I want to create an object that matches this interface. I tried doing this: ```typescript const user: User = { id: 1, name: 'Ivan', email: 'ivan@example.com' }; ``` This works, but if I try to create an empty object and then add fields, TypeScript complains: ```typescript const user: User = {}; user.id = 1; user.name = 'Ivan'; // Error: Type '{}' is not assignable to type 'User'. ``` I also saw that you can use `as` for type casting, but I read that it's dangerous. Please advise how to correctly create