GET /v2/clients

List every client visible to the authenticated user.

Path params: none.
Query params: none.

Response (200 OK):
{
  "data": [
    {
      "id": "string",
      "type": "client",
      "attributes": {
        "name": "string"
      },
      "relationships": {
        "parent":             { "data": { "type": "client", "id": "string" } | null },
        "children":           { "data": [{ "type": "client", "id": "string" }] },
        "legalEntities":      { "data": [{ "type": "legal-entity", "id": "string" }] },
        "reportingEntities":  { "data": [{ "type": "reporting-entity", "id": "string" }] }
      }
    }
  ]
}