How do I mock the imports my tested class makes with jest?

I'm trying to setup tests for my database crawler program and I can't manage to replace what the class method I'm testing imports.

So as not to write down too much code I'll just lay out the general form of the problem. In my test function I have:

describe("test",()=>{
  let result1;

  beforeAll(async ()=>{
    await createConnection();
  })

  afterAll(async ()=>{
    getConnection().close();
  })

  test("setup test",async () => {
    result1 = await WeatherController.startForecastAPI();
    expect(result1.status).toBe(Status.SUCCESS);
  })
})

Inside the WeatherController class, startForecastAPI is defined as a static async method. The class imports multiple other classes, among them the AccessToken class which is used to get valid access tokens. I want to mock the results of calling AccessToken but I'm not calling it directly in my test function, I'm calling WeatherController and WeatherController is calling AccessToken. How can I replace what WeatherController calls when I test it but without touching the WeatherController code? I've tried going through the jest docs but I'm fairly new to all of this and they're confusing. I'm not entirely clear how scoping works here either (I tried defining a function in the test code and calling it in the tested function but it's out of scope)