[File Explorer] Side bar links for users with shared files sometimes don't work

[KernelDeimos]

Clicking a sidebar link to a user with shared files sometimes results in an error message:

Failed to load directory

It is possible this is happening because the sidebar button is linking to the wrong user. This wrong user is most likely the previous username of a temporary user that was converted into a regular user.

[Lucatonello]

Hey I'd like to work on this issue.

I was able to reproduce the "Failed to load directory" error when clicking on a shared folder from the sidebar. It seems like it could be related to how usernames are resolved—possibly due to temporary users being converted into regular users, as mentioned.

Let me know if there's anything specific I should keep in mind before getting started. Looking forward to contributing!