[CAP] Dynamically set destination in package.json for an external connection

  "cds": {
    "requires": {
      "sfsf": {
        "kind": "odata-v2",
        "credentials": {
          "destination": "<set during runtime>",
          "path": "/odata/v2",
          "requestTimeout": 18000000
        }
      }
    }
  },

  /*
   * Handover query to some external SF OData Service to fecth the requested data
   */  
  srv.on("READ", Whatever, async req => {

        const sf_api_def = cds.env.requires['sfsf'] //defined in package.json

        sf_api_def.credentials.destination = "myDestinationName" //set your Destination name, could come from a customizing table

        const sfsfSrv = await cds.connect.to(sf_api_def)

        return await sfsfSrv.run(req.query)
    })