How to do authentication using SOAP?

Question

How do I authenticate users with SOAP?

Will I have to require the user to send his username and password with every SOAP request and I authenticate him against the d

Answer 1

Having the user send the username and password with each request is the way that I've seen most SOAP interfaces implemented. Actually, I've not seen any other implementation other than the API key idea, which is just trading a Username and Password for some other token.

SOAP interfaces should be stateless, like HTTP, so this seems like a normal consequence.