As the Internet moves towards higher security protocols, so do the authorization systems. OAuth 2.0 was introduced as an alternate and more secure login procedure compared to the classic protocol of username and password. OAuth 2.0 utilizes tokens that take the user information from other web apps to authenticate them for your own platform instead of having the user login over and over again. Introduced in 4D 19R3, 4D NetKit manages the OAuth 2.0 connection between 4D applications and 3rd party web services and their API to get these tokens. This technical note will go over the basics of 4D NetKit and how to use it to connect to Google’s Gmail and Microsoft’s Office365.