Get Firewall Connections using REST API

Hello,

I wanna get the active firewall connections using the REST API but

https://192.168.1.1/rest/ip/firewall/connection/print

doesn’t work(Bad Request)
Does somebody know the right Request Link to get all the current connections?

Thanks in advance

curl -k -u admin:password https://hostname/rest/ip/firewall/connection?confirmed=yes