why the visual studio code did not give import hint when using typescript

Question

I am using visual studio code to write a login function, this is the typescript code looks like:

import { LoginType } from "@model/enumn/LoginType";
import { WheelGlobal } from "@model/immutable/WheelGlobal";
import LocalStorage from "@utils/data/LocalStorage";
export const AuthHandler = {
    pluginLogin: async () => {
        let username:string = await LocalStorage.readLocalStorage(WheelGlobal.USER_NAME);
        let password:string = await LocalStorage.readLocalStorage(WheelGlobal.PASSWORD);
        let deviceId:string = await Device.getDeviceId();
        let appId:string = await LocalStorage.readLocalStorage(WheelGlobal.REDDWARF_APP_ID_KEY);
        let loginParams = {
            phone: username,
            password: password,
            deviceId: deviceId,
            app: Number(appId),
            deviceType: 7,
            loginType: LoginType.PHONE,
        };
        AuthHandler.login(loginParams);
    }
}

the problem is that the visual studio code did not tell me to import the Device, there is no error tips even though I did not import the Device. why did this happen? when I remove the LocalStorage import, the visual studio code would tell me to import the LocalStorage, why the Device import did not give the hint?