The OAuth 2.0 Password Grant Type is a way to get an access token given a username and password. It's typically used only by a service's own mobile apps and is not usually made available to third party developers.
Read moreThe Implicit Grant Type is a way for a single-page JavaScript app to get an access token without an intermediate code exchange step. It was originally created for use by JavaScript apps (which don't have a way to safely store secrets) but is only recommended in specific situations.
Read moreThe Authorization Code Grant Type is probably the most common of the OAuth 2.0 grant types that you'll encounter. It is used by both web apps and native apps to get an access token after a user authorizes an app.
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Aaron Parecki