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Documentation for LoopBack 4
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---
lang: en
title: 'API docs: repository.kvconnector.ttl'
keywords: LoopBack 4.0, LoopBack 4
sidebar: lb4_sidebar
permalink: /doc/en/lb4/apidocs.repository.kvconnector.ttl.html
---
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[Home](./index.md) > [@loopback/repository](./repository.md) > [KVConnector](./repository.kvconnector.md) > [ttl](./repository.kvconnector.ttl.md)
## KVConnector.ttl() method
Get ttl for an entry by key
<b>Signature:</b>
```typescript
ttl?(modelClass: Class<Entity>, key: string, ttl: number, options?: Options): Promise<number>;
```
## Parameters
| Parameter | Type | Description |
| --- | --- | --- |
| modelClass | <code>Class<Entity></code> | Model class |
| key | <code>string</code> | Key for the entry |
| ttl | <code>number</code> | Time to live in millisenconds |
| options | <code>Options</code> | Options for the operation |
<b>Returns:</b>
`Promise<number>`
A promise of the TTL value