Currently if you open https://segment.com/docs/connections/destinations/catalog/customer-io/#device-token-set-up you will see:

And if you will click on these "more here" it will open these pages:
However these anchors #how-should-i-use-outbounds-push-notifications and #how-do-i-use-push-notifications leads to nothing because there is no HTML element on the page with such ID. I also searched the opened pages for "device" and "token" words - there is no documentation for setting up device token.
So currently documentation completely misses how to properly set up context.device.token.
Currently if you open https://segment.com/docs/connections/destinations/catalog/customer-io/#device-token-set-up you will see:
And if you will click on these "more here" it will open these pages:
However these anchors
#how-should-i-use-outbounds-push-notificationsand#how-do-i-use-push-notificationsleads to nothing because there is no HTML element on the page with such ID. I also searched the opened pages for "device" and "token" words - there is no documentation for setting up device token.So currently documentation completely misses how to properly set up
context.device.token.