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[Home](./index.md) &gt; [calckey-js](./calckey-js.md) &gt; [api](./calckey-js.api.md) &gt; [APIClient](./calckey-js.api.apiclient.md) &gt; [credential](./calckey-js.api.apiclient.credential.md)

## api.APIClient.credential property

**Signature:**

```typescript
credential: string | null | undefined;
```