## Update

`express.update(strexpress_customer_id, ExpressUpdateParams**kwargs)  -> 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

- `express_customer_id: str`

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

- `express_customer_name: Optional[str]`

  Updated name for the Express customer

- `metadata: Optional[Dict[str, str]]`

  Updated metadata. Pass null to clear all metadata

### Returns

- `class ExpressUpdateResponse: …`

  An Express customer entity that groups users and studies

  - `created_at: Optional[datetime]`

    Timestamp when the Express customer was created

  - `express_customer_id: str`

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

  - `express_customer_name: str`

    Name of the Express customer

  - `is_active: bool`

    Whether the Express customer is currently active

  - `updated_at: Optional[datetime]`

    Timestamp when the Express customer was last updated

  - `user_count: int`

    Number of users currently in this Express customer

  - `created_by_api_key_id: Optional[str]`

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

  - `created_by_user_id: Optional[str]`

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

  - `metadata: Optional[Dict[str, str]]`

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

### Example

```python
import os
from avara import Avara

client = Avara(
    api_key=os.environ.get("AVARA_API_KEY"),  # This is the default and can be omitted
)
express = client.express.update(
    express_customer_id="cus_1234567890abcdef1234567890abcdef",
)
print(express.created_at)
```