def login(self,
	          command='su -',
	          user=None,
	          password=None,
	          prompt_prefix=None,
	          expect=None,
	          timeout=shutit_global.shutit_global_object.default_timeout,
	          escape=False,
	          echo=None,
	          note=None,
	          go_home=True,
	          fail_on_fail=True,
	          is_ssh=True,
	          check_sudo=True,
	          loglevel=logging.DEBUG):
		"""Logs user in on default child.
		"""
		shutit_global.shutit_global_object.yield_to_draw()
		shutit_pexpect_session = self.get_current_shutit_pexpect_session()
		return shutit_pexpect_session.login(ShutItSendSpec(shutit_pexpect_session,
		                                                   user=user,
		                                                   send=command,
		                                                   password=password,
		                                                   prompt_prefix=prompt_prefix,
		                                                   expect=expect,
		                                                   timeout=timeout,
		                                                   escape=escape,
		                                                   echo=echo,
		                                                   note=note,
		                                                   go_home=go_home,
		                                                   fail_on_fail=fail_on_fail,
		                                                   is_ssh=is_ssh,
		                                                   check_sudo=check_sudo,
		                                                   loglevel=loglevel))
Logs user in on default child.