Announcing Hitch API Assistant — the first API chat bot
Luke Miller
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(1) Dropbox for HTTP Developers, Dropbox Business API
The Dropbox Business API allows apps to manage the user lifecycle for a Dropbox Business account and perform API actions on all members of a team. It also gives apps programmatic access to Dropbox Business admin functionality. (2) Overview
With the Slack API, you can build integrations with the platform. Such as Messaging individual users or posting to a channel.
The Slack API uses HTTP methods over HTTPS https://slack.com/api/. The API responds with JSON and an HTTP status code. 2xx for success 4xx for not found and 5xx for service were unavailable.
Authentication
Authentication with the Slack API uses Bearer Token Authentication. Which you can locate in your Slack account. (3) Google Analytics

Implementation Guides and Solutions 
Integrating CRM Data with Google Analytics to create AdWords Remarketing Audiences 
This guide describes how to integrate CRM user data into Google Analytics and how to use that data to create AdWords remarketing Audiences. 
Overview of different integration options
Universal Analytics makes it possible for webmasters to send CRM data about their users to Google Analytics for segmentation, reporting and creating remarketing lists that can be used in AdWords for display campaigns or remarketing lists for search ads (RLSA). There are three ways to send CRM data to Google Analytics (which are not mutually exclusive): 
With analytics.js and via custom dimensions
With the Measurement Protocol
Uploading CSV files via Data Import. https://www.hitchhq.com/googleanalytics(4)