Another kiro login overlap the existed login

[kvokka]

Is it a request payload issue?
[ ] Yes, this is a request payload issue. I am using a client/cURL to send a request payload, but I received an unexpected error.
[x] No, it's another issue.

Describe the bug

GIVEN: User has existing credentials with Kiro
THEN: login with another account using ./CLIProxyAPI -kiro-login
EXPECT: have to have 2 files with different credentials
GOT: 1 file, the new login overlapped the existing credentials

CLI Type

./CLIProxyAPI -kiro-login

CLIProxyAPI Version: 6.8.27-0-plus, Commit: 4eeec29, BuiltAt: 2026-02-24T17:06:00Z