Type checking by interface in TypeScript: how to determine if an object matches an interface?

Hi everyone! I just started learning TypeScript and ran into a problem. I have a `User` interface and a function that receives data from an API. I need to check if the received object matches this interface. Here's my code: ```typescript interface User { id: number; name: string; email: string; } function processData(data: unknown) { // How to check that data is a User? if (data instanceof User) { // Error: 'User' refers only to a type, but is being used as a value here console.log(data.name); } } ``` I understand that `instanceof` doesn't work with interfaces because they are erased at runtime. But how then can I check that the object contains all the required fields with the correct types? I've seen that you can use custom type guards