## Update

`client.express.update(stringexpressCustomerID, ExpressUpdateParamsbody?, RequestOptionsoptions?): ExpressUpdateResponse`

**patch** `/v1/express/{expressCustomerId}`

Updates a customer's properties such as name or other metadata. All fields are optional - only provided fields will be updated.

### Parameters

- `expressCustomerID: string`

  Unique Express customer identifier. Format: cus_{32-hex-chars}

- `body: ExpressUpdateParams`

  - `expressCustomerName?: string`

    Updated name for the Express customer

  - `metadata?: Record<string, string> | null`

    Updated metadata. Pass null to clear all metadata

### Returns

- `ExpressUpdateResponse`

  An Express customer entity that groups users and studies

  - `createdAt: string | null`

    Timestamp when the Express customer was created

  - `expressCustomerId: string`

    Unique Express customer identifier. Format: cus_{32-hex-chars}

  - `expressCustomerName: string`

    Name of the Express customer

  - `isActive: boolean`

    Whether the Express customer is currently active

  - `updatedAt: string | null`

    Timestamp when the Express customer was last updated

  - `userCount: number`

    Number of users currently in this Express customer

  - `createdByApiKeyId?: string`

    UUID of the API key used to create this Express customer, for audit tracking

  - `createdByUserId?: string`

    User ID who created this Express customer via dashboard, null if created via API key

  - `metadata?: Record<string, string>`

    Custom key-value metadata for the Express customer. Maximum 50 pairs, keys up to 100 chars, values up to 1000 chars

### Example

```typescript
import Avara from 'avara';

const client = new Avara({
  apiKey: process.env['AVARA_API_KEY'], // This is the default and can be omitted
});

const express = await client.express.update('cus_1234567890abcdef1234567890abcdef');

console.log(express.createdAt);
```