# Users

## Add

`UserAddResponse Express.Users.Add(UserAddParamsparameters, CancellationTokencancellationToken = default)`

**post** `/v1/express/{expressCustomerId}/users`

Associates an existing user with a customer, granting them access to customer-specific resources and studies.

### Parameters

- `UserAddParams parameters`

  - `required string expressCustomerID`

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

  - `required string userID`

    User ID to add to the Express customer. Format: usr_{32-hex-chars}

### Returns

- `class UserAddResponse:`

  Standard success response with optional message

  - `required Boolean Success`

  - `string Message`

### Example

```csharp
UserAddParams parameters = new()
{
    ExpressCustomerID = "cus_1234567890abcdef1234567890abcdef",
    UserID = "usr_1234567890abcdef1234567890abcdef",
};

var response = await client.Express.Users.Add(parameters);

Console.WriteLine(response);
```

## Remove

`UserRemoveResponse Express.Users.Remove(UserRemoveParamsparameters, CancellationTokencancellationToken = default)`

**delete** `/v1/express/{expressCustomerId}/users`

Removes a user's association with a customer, revoking their access to customer-specific resources. The user account remains active but is no longer linked to this customer.

### Parameters

- `UserRemoveParams parameters`

  - `required string expressCustomerID`

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

  - `required string userID`

    User ID to remove from the Express customer. Format: usr_{32-hex-chars}

### Returns

- `class UserRemoveResponse:`

  Standard success response with optional message

  - `required Boolean Success`

  - `string Message`

### Example

```csharp
UserRemoveParams parameters = new()
{
    ExpressCustomerID = "cus_1234567890abcdef1234567890abcdef",
    UserID = "usr_1234567890abcdef1234567890abcdef",
};

var user = await client.Express.Users.Remove(parameters);

Console.WriteLine(user);
```