User count not updated after invited user deletes their account

[mirkohubtv]

Describe the Bug

When an admin invites a user to an organization, and the user accepts the invite but later deletes their Pangolin account, the user is still counted in the organization’s billing user count.

This results in an incorrect number of users being shown in the billing section.

Environment

Running on Pangolin Cloud, no local/self-hosted components involved.

To Reproduce

1. Login as Admin in an organization
2. Invite a new user via Manage Users
3. The invited user registers on Pangolin and accepts the invitation
4. The user deletes their Pangolin account
5. Go to the billing section

Expected Behavior

The deleted user should be automatically removed from the organization and should not be counted in billing.