Returns list of leave applications managers

Example response

{
  "leaveManagers": [
    {
      "id": "lEgFK5pUNvkUtqzE8jcmjYsvk0WlKqx9f_fHbMrk_0VIsw--",
      "name": "John Doe",
      "unit": "Unit name",
      "section": "Section name"
    }
  ]
}