intercom TFP new signup by dateRange Segmented by Region

mongodb query Col1.b Segmented by Region.js

var collName= 20180301 
// 2018-03-01 00:00:00 to 
// 2018-03-01 23:59:59
var dateRange= {"$gte":1519862400,"$lte":1519948799}
var queryDoc; queryDoc.signed_up_at = dateRange

db.getCollection(`${collName}`)
.aggregate([ 
    { $match:  queryDoc  }
    ,{ $group:
        { _id : "$custom_attributes.site_region",
           'Plan Names': { $addToSet: { "Plan Name" : "$custom_attributes.api_plan_name"}},
          "Total For Region" : {"$sum":1}
       }}
])