Curl Fail

gistfile1.txt

    APIMETHOD="/repos/${OWNER}/${REPO}/issues/$ISSUE/labels"
    URL="https://api.github.com/${APIMETHOD}"
    curl --header "Authorization: token ${TOKEN}" \
         -s \
         -XPOST \
         --data '{["enhancement"]}' \
         --location "${URL}"

-------------------------------------------

{
  "message": "Not Found",
  "documentation_url": "https://developer.github.com/v3"
}