We have a class with some users and we need to type it using interfaces.

class User {
   name: string = '';
   lastName: string = '';
   age: number = 18;
   isAdmin: boolean = false;

   constructor(props) {
      if (props?.name) this.name = props.name;
      if (props?.lastName) this.lastName = props.lastName;
      if (props?.age) this.age = props.age;
      if (props?.isAdmin) this.isAdmin= props.isAdmin;
   }

    add(key, value) {
       this[key] = value;
    }
}

The first interface will describe the types that come to our constructor and will look like this:

interface IUser {
  name?: string;
  lastName?: string;
  age?: number;
  isAdmin?: boolean;
}

Types in the second interface must inherit from the type described in the IUser interface. How can we implement this?