OAuth2 Grant Types Explained: Auth Code, Client Credentials, and Flows for Beginners
OAuth2 grant types can be confusing — which flow should you use, and why?
In this OAuth2 tutorial for beginners, we explain OAuth2 grant types step-by-step, comparing authorization flows like the authorization code grant, client credentials flow, implicit grant, and more. You'll learn what each flow does, when to use it, and the risks they’re designed to address.
🔐 What You’ll Learn:
OAuth2 grant types explained with real-world examples
OAuth2 flow comparison: pros, cons, and best use cases
What is the authorization code grant — and why it’s the most secure
Why the implicit grant is deprecated in modern apps
What is the resource owner password credentials flow
What is the client credentials grant and when to use it
What is the refresh token flow and why it matters
Whether you're building secure APIs or login systems, this video gives you a clear understanding of OAuth2 grant types and how to choose the right one.
▶️ Part of the “How the Internet is Secured” series:
• How the Internet Is Secured: HTTPS, TLS, O...
🔖 Chapters:
00:00 Introduction
00:09 Agenda
11:49 Authorization grant and flows - Introduction
02:07 Authorization code grant
04:26 Issues with authorization code grant
05:40 Implicit grant
06:24 Issues with implicit grant
06:47 Resource owner password credentials grant
07:58 Issues with resource owner password credentials grant
08:24 Client credentials grant
09:31 Refresh token grant
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