Create a new question in your template and select answer type: Source.
Select the source you want to use: user, teams or locations
Teams
This selection is based on the team structure you can find in organisation settings, depending on your permissions.
Users
Depending on your permissions the Capption users in your (sub)team or organisation are shown. You can find this list in organisation settings.
Locations
This selection is based on the locations in your organisational settings.