query /hf/v1/chat/completions for a spin, e.g.
curl -XPOST 127.0.0.1:7860/hf/v1/chat/completions -H "Authorization: Bearer Your_AUTHKEY"

or hf-space-url e.g.,
curl -XPOST https://mikeee-reka.hf.space/hf/v1/chat/completions -H "Authorization: Bearer Your_AUTHKEY" -H "Content-Type: application/json" --data "{\"model\": \"reka-core\", \"messages\": [{\"role\": \"user\", \"content\": \"Say this is a test!\"}]}"