How do you log out of a SMB share in Dolphin?

I've got a NAS. I've got a Music folder on the NAS. I've shared it with SMB.

I've got two users on the NAS, an admin account with read and write, and a guest account with only read privileges.

I used Dolphin on a KDE box, I clicked Network > Shared Folders (SMB) > The_NAS > Music. It threw a login window, I logged in as the admin.

How the fuck do I log back out to switch to the guest account? I know SMB is Microsoft's doing so it's pure weapons-grade gonorrhea but...why is this extremely obvious usability feature missing?