How to use the testcafe.t.useRole function in testcafe

async navigateDeletePdfEntries (text, formName) {
    await t
      .useRole(admin)
      .navigateTo(`${baseURL}/wp-admin/admin.php?page=${text}`)
      .hover(formList(formName))
      .click(formEntries(formName))
      .hover(this.settingsMenu)
      .click(link('.gf_submenu', 'PDF'))
    let tempalte = await this.template.count
    if (tempalte > 0) {
      for (let i = 0; i < tempalte; i++) {
        await t
          .hover(this.template)
          .click(this.deletePDF)
          .click(this.confirmDelete)
          .wait(2000)
      }
    }

test('Test1', async() => {
  await t
        .useRole(someUser)
        .expect(userName.textContent).eql('SomeUser')
        .useRole(Role.anonymous())
        .expect(userName.textContent).eql('');
})

async navigateSettingsTab (text) {
    await t
      .useRole(admin)
      .navigateTo(`${baseURL}/wp-admin/admin.php?page=${text}`)
      .click(this.runSetupButton)
  }
}

async navigatePage () {
    await t
      .useRole(admin)
      .navigateTo(`${baseURL}/wp-admin/edit.php?post_type=page`)
  }

async navigateSettingsTab (text) {
    await t
      .useRole(admin)
      .navigateTo(`${baseURL}/wp-admin/admin.php?page=${text}`)
      .click(this.downloadButton)
  }
}

async navigateSettingsTab (text) {
    await t
      .useRole(admin)
      .navigateTo(`${baseURL}/wp-admin/admin.php?page=${text}`)
      .click(this.licenseInputField)
      .selectText(this.licenseInputField, 32, 0)
      .pressKey('backspace')
  }
}

async navigateConfirmationsSection (text) {
    await t
      .useRole(admin)
      .navigateTo(`${baseURL}/wp-admin/admin.php?page=${text}`)
      .click(link('#the-list', 'Default Confirmation'))
  }

async navigateConfirmationsSection (text) {
    await t
      .useRole(admin)
      .navigateTo(`${baseURL}/wp-admin/admin.php?page=${text}`)
      .click(link('#the-list', 'Default Confirmation'))
  }
}

async navigateSettingsTab (text) {
    await t
      .useRole(admin)
      .navigateTo(`${baseURL}/wp-admin/admin.php?page=${text}`)
      .click(button('Manage Fonts'))
  }
}

async navigateSettingsTab (text) {
    await t
      .useRole(admin)
      .navigateTo(`${baseURL}/wp-admin/admin.php?page=${text}`)
      .click(this.sectionTable)
      .click(this.downloadButton, { speed: 1 })
  }
}