Invalid Authorization when using API key

Hello,

I have signed up for rest api new application to test I created api key.

Its been 3 days I keep getting this error: {“error”:“Invalid Authorization”,“type”:“ch:service”}

curl -XGET -u 33111333-6272-4373-3651-663417361711: ``https://api.company-information.service.gov.uk/company/00000006

the api key I have pasted is not the actual key but I have pasted for awareness of its format.