# Check if user exists

Check if a user exists using any identifier field (id, email, etc.)

Endpoint: GET /users/exists
Version: 2.0.2
Security: projectKey

## Query parameters:

  - `filterValue` (string, required)
    Value to search for

  - `filterKey` (string)
    Field to use for identification (id, email, instagramAccountId, etc.)
    Enum: "id", "email", "instagramAccountId", "externalId"

## Response 200 fields (application/json):

  - `exists` (boolean)
    Example: true

  - `identifier` (string)
    Example: "email"


## Response 400 fields

## Response 404 fields