Sets socks proxy username setting.

        :Args:
         - value: The socks proxy username value.

def socks_username(self, value):
        """
        Sets socks proxy username setting.

        :Args:
         - value: The socks proxy username value.
        """
        self._verify_proxy_type_compatibility(ProxyType.MANUAL)
        self.proxyType = ProxyType.MANUAL
        self.socksUsername = value