How to use the api/utils/testing_db.disconnect function in api

afterAll((done) => {
    db.disconnect().then(done);
  });

afterAll((done) => {
    db.disconnect().then(done);
  });

afterAll(async () => {
    await fileUtils.deleteFiles([
      path.join(configPaths.uploadedDocuments, 'generated1.pdf'),
      path.join(configPaths.uploadedDocuments, 'generated2.pdf'),
      path.join(configPaths.uploadedDocuments, `${imported[0]._id.toString()}.jpg`),
      path.join(configPaths.uploadedDocuments, `${imported[1]._id.toString()}.jpg`),
      path.join(configPaths.uploadedDocuments, `${imported[2]._id.toString()}.jpg`),
      path.join(configPaths.uploadedDocuments, `${imported[3]._id.toString()}.jpg`),
      path.join(configPaths.uploadedDocuments, `${imported[4]._id.toString()}.jpg`),
      path.join(configPaths.uploadedDocuments, `${imported[5]._id.toString()}.jpg`),
    ]);

    await removeTestingZip();
    await db.disconnect();
  });

afterAll((done) => {
    testingDB.disconnect().then(done);
  });

afterAll((done) => {
    db.disconnect().then(done);
  });

afterAll((done) => {
    testingDB.disconnect().then(done);
  });

afterAll((done) => {
    db.disconnect().then(done);
  });

  afterAll(async () => db.disconnect());
  beforeAll(async () => {

afterAll((done) => {
    db.disconnect().then(done);
  });

afterAll((done) => {
    db.disconnect().then(done);
  });