Unable to rwrite request spec using rspec for devise login for rails-api application

Question

We use Rails 6.1 API application with devise and devise-jwt. I tried to write a feature spec using RSpec for sign_in method but could not write. I have the following in my rails_helper.rb

 config.include Devise::Test::ControllerHelpers, type: :controller
  config.include Devise::Test::ControllerHelpers, type: :view
  config.include Devise::Test::IntegrationHelpers, type: :request
  config.include Devise::Test::IntegrationHelpers, type: :feature
  config.extend ControllerMacros, :type => :controller
  config.include Warden::Test::Helpers
  Warden.test_mode!
  config.include FactoryBot::Syntax::Methods

and the spec under spec/requests/users/sessions_controller_spec.rb is

 context 'When logging in' do
    before do
      request.env["devise.mapping"] = Devise.mappings[:user]
      user = FactoryBot.create(:user)
      sign_in user
    end

    it 'returns a token' do
      expect(response.headers['Authorization']).to be_present
    end

    it 'returns 200' do
      expect(response.status).to eq(200)
    end
  end

But still not able to succeed any idea?