oData PHP Client Authentication

[lilmer]

Hello, 

 

I am trying to connect to the oData service API, I already generated the file which has all the method I need. My problem is when I run in on the web site it shows 401 (Unauthorize user), so i need to input username and password to connect to the OData Service, but I don't know where to put my username or password.

define("DEFAULT_ODATA_SERVICE_URL", "https://sample.service.site/Wcf.OData.svc/");