How to use the default keyring using SecretServiceBackend?

Whatever I use for `LibSecretCollectionName` or `ServiceName`, the library attempts to create a new keyring. How can I use the default keyring? In seahorse it is listed as `Default keyring`:


Even if I name the collection the same way, the library will create a new keyring with the same name:

```Go
package main

import (
"github.com/99designs/keyring"
)

func main() {
ring, err := keyring.Open(keyring.Config{
AllowedBackends: []keyring.BackendType{
keyring.SecretServiceBackend,
},
LibSecretCollectionName: "Default keyring",
ServiceName: "myapp",
})
if err != nil {
panic(err)
}

err = ring.Set(keyring.Item{
Key: "foo",
Data: []byte("secret-bar"),
})
if err != nil {
panic(err)
}
}
```


With the https://github.com/zalando/go-keyring library, using their example from the README will write to the default keyring, so it should be possible somehow.

查看 keyring 函式庫中的 SecretServiceBackend 實作，可能位於類似 secret_service.go 的檔案中。將其與 zalando/go-keyring 函式庫使用預設 keyring 的方式進行比較。目標是修改該函式庫，使其使用現有的 'Default keyring' collection，而不是建立新的 collection。透過執行提供的 Go 程式碼並檢查 keyring UI（如 seahorse）來測試，查看項目建立在哪裡。

由索引模型根據 Issue 內容生成。