Logout offline access token/session

Hello guys,

I’m trying to revoke an offline access token through:

curl -X GET "http://keycloakurl/auth/realms/master/protocol/openid-connect/logout" \
		-H "Content-Type: application/x-www-form-urlencoded" \
        -d "client_id=${CLIENT_ID}" -d "client_secret=${CLIENT_SECRET}" \
        -d "refresh_token=${MY_OFFLINE_REFRESH_TOKEN}"

But I’m getting no response in the terminal. Am I doing something wrong? I’ve searched and discovered a few issues about this, but apparently they are solved, but my problem persist.
I tried, too, to pass one more header:
-H "Authorization: Bearer ${CLIENT_ACCESS_TOKEN}"
But without success.

Thank you for your attention!