You need an email or a Username and a password to sign in. You provide these when you open a new account or someone adds you as a collaborator in an application.

Click on the user id shown on the top right-hand side of the Header on any screen and choose Sign out from the drop down list.

Click on the user id shown on the top right-hand side of the Header on any screen and choose Configure Account Settings.

You can configure/customize the Component types for applications, Solution data for problems, cause categories and sub-categories for a fishbone cause, and Delete Users.

Only the owner/admin of an account has the privilege to configure the settings.