> For the complete documentation index, see [llms.txt](https://docs-old.telematicssdk.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs-old.telematicssdk.com/platform-features/back-end-as-a-service/check-user-existence.md).

# \*Check User Existence

## UserExists

<mark style="color:blue;">`GET`</mark> `https://user.telematicssdk.com/v1/Check/UserExists`

**Authorization:** Allow Anonymous

#### Query Parameters

| Name     | Type   | Description              |
| -------- | ------ | ------------------------ |
| Phone    | string | Phone number of the user |
| Email    | string | Email of the user        |
| ClientID | string | ClientID of the user     |

#### Headers

| Name      | Type   | Description                         |
| --------- | ------ | ----------------------------------- |
| InsanceID | string | Instance where to look for the user |

{% tabs %}
{% tab title="200 " %}

```
{
  "Result": {
    "UserExists": true, // true or false
    "FirstName": "string",
    "LastName": "string",
    "Nickname": "string",
    "ImageUrl": "string"
  },
  "Status": 200,
  "Title": "",
  "Errors": []
}
```

{% endtab %}
{% endtabs %}