You can find your profile settings in the uper right-hand corner of the Cockpit, where you see your profile picture. You can either click on your profile picture or on the arrow next to it and chose "Profile & settings".
The settings allow you to change and configure a variety of different things. Here, you can manage your account, change both your password and language, manage your e-mail notifications or enter an absence (out of office). That is also where you can log out.