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[[oauth2-introduction]]
== Introduction to the Spring Security OAuth2 Plugin

The OAuth2 Plugin adds oAuth v2 sign-on support to Grails applications that use Spring Security. It depends on the xref:springSecurityCore.adoc#springSecurityCore[Spring Security Core plugin].

It comes with a number of preconfigured OAuth2 providers, but you can implement any provider you like, that is extending the https://github.com/scribejava/scribejava/blob/master/scribejava-core/src/main/java/com/github/scribejava/core/builder/api/DefaultApi20.java[Scribejava DefaultApi20]
