Listar segmentos

{  "success": true,  "total": 0,  "segments": [    {      "id_segment": "string",      "name": "string",      "total_channels": 0,      "total_groups": 0,      "created_at": "2019-08-24T14:15:22Z",      "monitoring": true    }  ]}

{  "success": false,  "error": "Unauthorized",  "message": "Chave de API inválida ou ausente."}

{  "success": false,  "error": "Internal Server Error",  "message": "Erro interno ao processar a requisição."}