The credential repository is available in the Enterprise edition and allows you to to set multiple sessions to a specific set of credential. This simplifies management by forcing users to modify their credentials in one place. The list is visible in the tree view under the session list.
To create an entry, use the session's context menu and select Add - Credential Repository.
The Credentials branch is visible in the tree view under the session list by default (if the Merge credentials list with sessions option is not enabled in File - Options - User Interface - Tree View).
You can configure the credential repository to prompt you to select a set of credentials which allows you to use multiple credentials for the same host.
New Entry - Credentials