Binding for short link generator

function.json

{
  "bindings": [
    {
      "type": "table",
      "name": "keyTable",
      "tableName": "urls",
      "partitionKey": "1",
      "rowKey": "KEY",
      "take": 1,
      "connection": "AzureWebJobsStorage",
      "direction": "in"
    },
    {
      "type": "table",
      "name": "tableOut",
      "tableName": "urls",
      "connection": "AzureWebJobsStorage",
      "direction": "out"
    },
    {
      "type": "httpTrigger",
      "name": "req",
      "authLevel": "function",
      "direction": "in"
    },
    {
      "type": "http",
      "name": "$return",
      "direction": "out"
    }
  ],
  "disabled": false
}