API - HTTP Authorization header

[Curious_Curious]

Hello,

I am trying to connect to an API and the documentation for it says that 'For each API call, you must set the HTTP header Content-Type: application/json, and provide an HTTP Authorization header with your username and password'

When I go and select 'Web' as a data source, the only option I am able to see is Content-type but not Authorization.

When I connect without Authorization I get the following:

 

Would anyone be able to advise how I can put the username and password so I can connect please?

Thank you