# Check if user exists

Endpoint: HEAD /users
Version: 1.5
Security: bearerAuth

## Query parameters:

  - `username` (string)
    Filter by username
    Example: "xyz | in:x,y | like:xyz"

  - `email` (string)
    Filter by email
    Example: "xyz | in:x,y | like:xyz"

  - `firstName` (string)
    Filter by first name
    Example: "xyz | in:x,y | like:xyz"

  - `lastName` (string)
    Filter by last name
    Example: "xyz | in:x,y | like:xyz"

  - `contractOwner` (string)
    Filter by contract owner name
    Example: "xyz | in:x,y | like:xyz"

  - `enabled` (string)
    A boolean flag to specify if the user is enabled or disabled
    Example: "true | false"


## Response 200 fields

## Response 400 fields

## Response 401 fields

## Response 403 fields

## Response 404 fields