An Example Tableau + AdStage Connector (untested)

connector.js

(function() {
     // STEP 1 - CONFIGURE:
     var adstageToken = "deadxxxxxbeef";
     var adstageOrgId = 80;
     
    
     // This makes it so AJAX calls are authenticated:
     $.ajaxSetup({
        beforeSend: function(xhr) {
            xhr.setRequestHeader('Authorization', 'Bearer ' + adstageToken);
            xhr.setRequestHeader('Accept', 'application/json');
        }
     });
     
     //
     // Connector definition
     // 
     var myConnector = tableau.makeConnector();
     var connectionUrl = "https://platform.adstage.io/api/organizations/" + adstageOrgId + "/build_report";
     
     // NOTES: The getSchema function defines the columns you want to show up in 
     // tableau and what type of data they are add more columns here, order will matter.
     myConnector.getSchema = function(schemaCallback) {
         // NOTES: If you needed to pull data from the form where they click the button
         // you could fetch it here
         var data = tableau.connectionData;

         var cols = [
             { id: "entity_id", alias: "Entity ID", dataType: tableau.dataTypeEnum.string },
             { id: "date", alias: "Date", dataType: tableau.dataTypeEnum.date },
             { id: "spend", alias: "Spend", dataType: tableau.dataTypeEnum.float }
             // STEP 3: add columns as needed
         ];
        
         var tableInfo = {
             id: "adstage_campaigns",
             columns: cols
         };
         schemaCallback([tableInfo]); // tell tableau about the fields and their types (can have multiple tables)
     };

     myConnector.getData = function(table, doneCallback) {
         
         // STEP 2: Configure to fit needs
         var report = {
             date_range: "this_month",
             entity_level: "campaigns",
             fields: ["spend"],
             limit: 500,
             aggregate_by: "day"
         };

         var APIPromise = makeAPIRequest(table, report, connectionUrl); 

         APIPromise.then(function(response) {
             console.log("Success");
             doneCallback();
         }, function(error) {
             console.error(error);
         });
     };

     function makeAPIRequest(table, report, connectionUrl) {
         return new Promise(function(resolve, reject) {
             var xhr = $.ajax({
                 url: connectionUrl,
                 type: "POST",
                 data: JSON.stringify(report),
                 contentType: 'application/json',
                 dataType: 'json',
                 success: function(data) {
                     if (data._embedded["adstage:time_series"]) {
                         var series = data._embedded["adstage:time_series"];
                         var ii, jj;
                         var toRet = [];
                         
                         // mash the data into an array of objects
                         for (ii = 0; ii < series.length; ++ii) {
                             var meta = series[ii].meta;
                             var list = series[ii].series;
                             for (jj = 0; jj < list.length; ++jj) {
                                 // STEP 3: add columns as needed
                                 var entry = [meta.entity_id, Date.parse(list[jj].timeframe.start), list[jj].data["spend"]];
                                 toRet.push(entry);
                             }
                         }

                         table.appendRows(toRet);
                         resolve();
                     } else {
                         Promise.reject("No results found for ticker symbol: " + ticker);
                     }
                 },
                 error: function(xhr, ajaxOptions, thrownError) {
                     Promise.reject("error connecting to the yahoo stock data source: " + thrownError);
                 }
             });
         });
     }

     setupConnector = function() {
        // NOTES: If you needed to set up data to pass from the main page to the connector, set it on connectionData
        tableau.connectionData = null;
        tableau.connectionName = 'AdStage Data - Campaigns This Month'; // name the data source. This will be the data source name in Tableau
        tableau.submit();
     };

     tableau.registerConnector(myConnector);

     //
     // Setup connector UI
     //
     $(document).ready(function() {
         $("#submitButton").click(function() { // This event fires when a button is clicked
             setupConnector();
         });
         $('#tickerForm').submit(function(event) {
             event.preventDefault();
             setupConnector();
         });
     });
 })();