Dummy auth for Svelte in Typescript

dummyAuth.ts

import { writable, type Writable } from "svelte/store";

import axios from "axios";

export type Token = "Authenticated" | "Unauthenticated";

export class UserDataCredentials {
  private readonly accessToken: string;
  private readonly status: Token;

  constructor(accessToken: string, status: Token = "Unauthenticated") {
    this.accessToken = accessToken;
    this.status = status;
  }

  get isAuthenticated() {
    return this.status === "Authenticated";
  }

  get token() {
    return this.accessToken;
  }

  get authorizationHeader() {
    return `Bearer ${this.token}`;
  }
}

export type WritableToken = Writable<UserDataCredentials>;

export const userCredentials: WritableToken = writable<UserDataCredentials>(
  new UserDataCredentials(""),
);

export async function loginAuthenticateToken(
  username: string,
  password: string,
): Promise<WritableToken> {
  const response = await axios.post("https://dummyjson.com/auth/login", {
    username: username,
    password: password,
    expiresInMins: 30,
  });

  let accessToken: string = "";
  let status: Token = "Unauthenticated";

  if (response.status == 200) {
    status = "Authenticated";
    accessToken = response?.data?.accessToken || "";
  }

  userCredentials.set(new UserDataCredentials(accessToken, status));

  return userCredentials;
}

export async function refreshAuthenticateToken() {}

export async function logoutAuthenticateToken() {
  userCredentials.set(new UserDataCredentials(""));
}

export function dischargeAuthenticateToken() {
  return userCredentials.subscribe((count) => count);
}