Getting status with the API and cURL

Hello guys and thanks for such amazing product. I’m working on the monitoring of the C5 using the API which works fine in my browser as

https:///core/api/service/status?username=MyUsername&password=MySuperStrongPassword

And there is all the info that I need, however I’m having difficulties getting the XML with curl:

curl --insecure --request GET https:///core/api/service/status?username=MyUsername&password=MySuperStrongPassword?

<?xml version='1.0'?> 0 U_LOGIN: Login failed

I tried several variations for curl without success. Can you give me a help with this?