## Add Key

`client.V1.CustomFields.AddKey(ctx, body) error`

**post** `/v1/customFields/addKey`

Add a key to the allow list for a given entity. There is a 100 character limit on custom field keys.

### Parameters

- **body:** `V1CustomFieldAddKeyParams`

  - **EnforceUniqueness:** `param.Field[bool]`

  - **Entity:** `param.Field[V1CustomFieldAddKeyParamsEntity]`

    - `V1CustomFieldAddKeyParamsEntity`

    - `V1CustomFieldAddKeyParamsEntity`

    - `V1CustomFieldAddKeyParamsEntity`

    - `V1CustomFieldAddKeyParamsEntity`

    - `V1CustomFieldAddKeyParamsEntity`

    - `V1CustomFieldAddKeyParamsEntity`

    - `V1CustomFieldAddKeyParamsEntity`

    - `V1CustomFieldAddKeyParamsEntity`

    - `V1CustomFieldAddKeyParamsEntity`

    - `V1CustomFieldAddKeyParamsEntity`

    - `V1CustomFieldAddKeyParamsEntity`

    - `V1CustomFieldAddKeyParamsEntity`

    - `V1CustomFieldAddKeyParamsEntity`

    - `V1CustomFieldAddKeyParamsEntity`

    - `V1CustomFieldAddKeyParamsEntity`

    - `V1CustomFieldAddKeyParamsEntity`

    - `V1CustomFieldAddKeyParamsEntity`

    - `V1CustomFieldAddKeyParamsEntity`

  - **Key:** `param.Field[string]`

### Example

```go
package main

import (
  "context"

  "github.com/Metronome-Industries/metronome-go"
  "github.com/Metronome-Industries/metronome-go/option"
)

func main() {
  client := metronome.NewClient(
    option.WithBearerToken("My Bearer Token"),
  )
  err := client.V1.CustomFields.AddKey(context.TODO(), metronome.V1CustomFieldAddKeyParams{
    EnforceUniqueness: metronome.F(true),
    Entity: metronome.F(metronome.V1CustomFieldAddKeyParamsEntityCustomer),
    Key: metronome.F("x_account_id"),
  })
  if err != nil {
    panic(err.Error())
  }
}
```