AuthenticateUser
SET_ERROR(result, fSecurityContext->AuthenticateUser(userName,
status_t AuthenticateUser(const char* name,
result = AuthenticateUser(credentials.Nickname(), credentials.PasswordClear(),
status_t result = AuthenticateUser(nickName, passwordClear, responseEnvelopeMessage);
status_t AuthenticateUser(const BString& nickName,
status_t status = interface->AuthenticateUser(userCredentials.Nickname(),