playing away from home

If I start an online game at home and then visit a friend for a few days is it as simple as just LOGGING IN in with my playing name or do I have to submit a PASSWORD in addition? When I finish at my friend's house do I then LOG OUT so I can continue the game on my return after LOGGING IN again? 

Log off your account at your house.

Log in using username and password from your friends house, make your moves in your games, when you're done, log off your account.

When you get home, log back in using your username and password.

To access your own account you have to enter username and password :)

Dear kohai,

Very many thanks for your swift and more than helpful reply.

Kind regards,

ekordbal (Adam)