There are multiple endpoints ending with "/tokens". Some of these endpoints then have an added # and number (such as "/tokens#1"). These hash tags are strictly added to allow multiple documents for the same endpoint. In actuality, these endpoints are interchangeable and "/tokens" can be used in all cases.
curl --location 'https://awqacore01.crexendocloud.com/ns-api/v2/tokensHASHHACK1' \
--header 'Content-Type: application/json' \
--data '{
"grant_type": "refresh_token",
"client_id": "",
"client_secret": "",
"refresh_token": ""
}'{}