type: object
properties:
  id:
    type: string
    description: A unique identifier.
    example: JtRm05yjMAuFCI2uwnFp
    readOnly: true
  description:
    type: string
    description: An optional description of the participant.
    example: John Doe
  has-participed:
    type: boolean
    description: True if the participant already participed to the poll, False otherwise.
    example: true
  poll-id:
    type: string
    description: The identifier of the poll that the participant participates on.
    example: 1jDe1e5eF_IkaYPuoIYX
  user-id:
    type: string
    description: The identifier of the user.
    example: 1jDe1e5eF_IkaYPuoIYX
  mail:
    type: string    
    description: The mail that will eventually created at the creation of the participant (not kept in memory).
    example: john-doe@example.com
required:
  - poll-id