Consume Java based service in WCF with SOAP authintication

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C#

I have WSDL file, which I added as ServiceReference in my WCF service.
Now I want to authenticate first and then invoke the method.
How do I achieve this? The soap is like below.

<soapenv:envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:pay="http://TestPaymentService.com/">
<soapenv:header xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<wsse:security xmlns:wsse="http://schemas.xmlsoap.org/ws/2002/04/secext">
<wsse:usernametoken>
<wsse:username>MyUserName</wsse:username>
<wsse:password>MyPassword</wsse:password>
</wsse:usernametoken>
</wsse:security>
</soapenv:header>
<soapenv:body>
</soapenv:body>
</soapenv:envelope>