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## Describe your changes
NewAuth builds a fresh in-memory configuration on every call, which
means a new WireGuard key each time. The peer registers under that key
and the key is written out, so any peer registered by an earlier call is
orphaned on the server — a client that enrols twice leaves two entries
and owns neither.
It also breaks the enrol-then-run sequence. `RunWithoutLogin` reloads
the configuration from disk through `UpdateOrCreateConfig`, so the
identity that registered is not necessarily the identity that runs, and
the management stream rejects it:
```
failed to login to Management Service: rpc error: code = PermissionDenied
desc = no peer auth method provided, please use a setup key or interactive SSO login
```
followed by a panic in `ConnectClient.run`.
### How it was found
Embedding the Android client in an application that enrols with a setup
key and then runs. Eight orphaned peers accumulated on a self-hosted
management server before the cause was clear, because every restart
registered a new one.
### The change
`NewAuth` passes `ConfigPath` and uses `UpdateOrCreateConfig`, so an
existing configuration is reused and one is only created when absent. A
caller wanting a fresh identity can delete the file — which is what
"forget this account" already does.
### Test
`TestNewAuth_ReusesPersistedIdentity` fails on the current code:
```
--- FAIL: TestNewAuth_ReusesPersistedIdentity (0.00s)
login_test.go:33: private key changed between calls: a second enrolment would orphan the peer registered by the first
```
and passes with the fix. `TestNewAuth_CreatesConfigWhenAbsent` covers
the first-enrolment path being unchanged. Both run in `client/android`
on Linux.
Per CONTRIBUTING, opening directly as a bug fix rather than raising an
issue first.
## Issue ticket number and link
[NET-1465](https://linear.app/netbird/issue/NET-1465/agent-network-rest-api-settings-defaults-bootstrap-via-put-provider)
## Stack
<!-- branch-stack -->
### Checklist
- [x] Is it a bug fix
- [ ] Is a typo/documentation fix
- [ ] Is a feature enhancement
- [ ] It is a refactor
- [ ] Created tests that fail without the change (if possible)
- [ ] I ran and tested this change locally — I did not rely on CI to
find out whether it works
- [ ] This PR has a single purpose (not a fix + refactor + feature in
one)
- [ ] This change is a trivial fix, **OR** it links an issue the NetBird
team agreed on beforehand. Changes to the public API, gRPC protocols,
functionality behavior, CLI / service flags, or new features always need
that agreement first. See
[CONTRIBUTING.md](https://github.com/netbirdio/netbird/blob/main/CONTRIBUTING.md#ticket-first-pr-second).
> By submitting this pull request, you confirm that you have read and
agree to the terms of the [Contributor License
Agreement](https://github.com/netbirdio/netbird/blob/main/CONTRIBUTOR_LICENSE_AGREEMENT.md).
## Documentation
Select exactly one:
- [ ] I added/updated documentation for this change
- [x] Documentation is **not needed** for this change (explain why): the
API reference is generated from the OpenAPI spec, which this PR updates
in-repo.
### Docs PR URL (required if "docs added" is checked)
Paste the PR link from https://github.com/netbirdio/docs here:
https://github.com/netbirdio/docs/pull/__
Co-authored-by: Zoltan Papp <zoltan.pmail@gmail.com>