Rest connector with Loopback 3.x (loopback-connector-rest)

Question

I'm new with loopback (I'm using 3.27 version). I'm trying to call an endpoint REST that gives me a json.

I created a Datasource:

{
  "connector": "rest",
  "debug": false,
  "options": {
    "headers": {
      "accept": "application/json",
      "content-type": "application/json"
    },
    "strictSSL": false
  },
  "operations": [
    {
      "template": {
        "method": "GET",
        "url": "http://foobar.com,
        "options": {
          "strictSSL": false,
          "useQuerystring": false
        },
        "responsePath": "$.results"
      },
      "functions": {
        “getFooBar: []
      }
    }
  ]
}

Then in a boot script, I would invoke the endpoint that I defined in the datasource (foobar) programmatically, because it has to be called from a crontab.

• How can I invoke the GET operation?
• I have to create a function in the boot script named getFooBar()?
• How can I get the JSON returned by the endpoint?

Thank you