curl --request GET \
  --url https://api.nuwebgroup.com/v1/checkout/connection-token \
  --header 'Authorization: Bearer <token>'

{
  "object": "terminal.connection_token",
  "secred": "pst_test_YWNjdF8xR1JIUWZFb3gwcG14Y0hsIQZhTHJRS1laekxtbEhzT2JiaDFueDU1TExEOHVEM0k_00CMAcd7jd"
}