Retrieves details of a specific signer by ID.

{
  "data": {
    "config": {
      "address": "string",
      "key_name": "string",
      "mount_point": "string",
      "namespace": "string"
    },
    "id": "string",
    "type": "local"
  },
  "error": "string",
  "pagination": {
    "current_page": 0,
    "per_page": 0,
    "total_items": 0
  },
  "success": true
}

{
  "data": null,
  "message": "Bad Request",
  "success": false
}

{
  "data": null,
  "message": "Unauthorized",
  "success": false
}

{
  "data": null,
  "message": "Signer not found",
  "success": false
}

{
  "data": null,
  "message": "Internal Server Error",
  "success": false
}