List alert templates

curl --request GET \
  --url https://api.togai.com/alert_templates \
  --header 'Authorization: Bearer <token>'

{
  "data": [
    {
      "id": "abcd-efgh-ijkl-mnop",
      "name": "Alert1",
      "desc": "Alert1 Description",
      "entitySchema": "{\"type\":\"object\",\"properties\":{\"usageMeterId\":{\"type\":\"string\"}}}",
      "entityType": "UsageMeter",
      "defaultInterval": "30",
      "parametersSchema": "{\"type\":\"object\",\"properties\":{\"threshold\":{\"type\":\"number\"}}}",
      "ownerSchema": "{\"type\":\"object\",\"properties\":{\"accountId\":{\"type\":\"string\"}}}",
      "ownerType": "Account",
      "createdAt": "2020-01-01T00:00:00Z",
      "updatedAt": "2020-01-01T00:00:00Z"
    }
  ],
  "nextToken": "eyJsYXN0SXRlbUlkIjogInN0cmluZyIsICJwYWdlU2l6ZSI6IDEwMCwgInNvcnRPcmRlciI6ICJhc2MifQ=="
}