If you want to use widgets, you need to add integrated apps. Those apps you can add in your widgets. 

This is how to add a new integrated app:

1. Click on "My integrations" in your app in the top right corner or in your web workplace in the navigation bar. 
2. Open the tab "Integrated Apps" by clicking on it
3. Click the button "Create new integration" 
   
   
   
   
4. Choose the app you want to integrate into your workplace
5. The next step is to click on "Connect new account"
   
   
   
   The login screen of your app will open and you need to log in
6. Mark your newly added account and click on "Save connected app"

This is how you edit integrated apps:

1. Click on "My integrations" in your app in the top right corner or in your web workplace in the navigation bar. 
2. Open the tab "Integrated Apps" by clicking on it
3. Look for the app you want to edit and click on "edit"
4. Here you can change your apps name and description or choose the color of your app. You can also delete your integrated app
   
   
   
   
5. Don't forget to save your changes