get:
  operationId: GetAuthEmail
  summary: Check if email has account
  description: Checks if a Customer with the given email has signed up.
  parameters:
    - in: path
      name: email
      schema:
        type: string
        format: email
      required: true
      description: The email to check if exists.
  tags:
    - Auth
  responses:
    '200':
      description: OK
      content:
        application/json:
          schema:
            properties:
              exists:
                type: boolean
                description: Whether email exists or not.