Separate OAuth 2.0 Client Reactive Docs

Related gh-10367

Author: Steve Riesenberg

docs/modules/ROOT/nav.adoc

@@ -124,7 +124,9 @@
 ** Authorization
 *** xref:reactive/authorization/method.adoc[EnableReactiveMethodSecurity]
 ** xref:reactive/oauth2/index.adoc[OAuth2]
-*** xref:reactive/oauth2/login.adoc[OAuth2 Log In]
+*** xref:reactive/oauth2/login/index.adoc[OAuth2 Log In]
+**** xref:reactive/oauth2/login/core.adoc[Core Configuration]
+**** xref:reactive/oauth2/login/advanced.adoc[Advanced Configuration]
 *** xref:reactive/oauth2/client/index.adoc[OAuth2 Client]
 **** xref:reactive/oauth2/client/core.adoc[Core Interfaces and Classes]
 **** xref:reactive/oauth2/client/authorization-grants.adoc[OAuth2 Authorization Grants]

docs/modules/ROOT/pages/reactive/oauth2/index.adoc

@@ -3,6 +3,6 @@
 
 Spring Security provides OAuth2 and WebFlux integration for reactive applications.
 
-* xref:reactive/oauth2/login.adoc[OAuth2 Log In] - Authenticating with an OAuth2 or OpenID Connect 1.0 Provider
+* xref:reactive/oauth2/login/index.adoc[OAuth2 Log In] - Authenticating with an OAuth2 or OpenID Connect 1.0 Provider
 * xref:reactive/oauth2/client/index.adoc[OAuth2 Client] - Making requests to an OAuth2 Resource Server
 * xref:reactive/oauth2/resource-server/index.adoc[OAuth2 Resource Server] - Protecting a REST endpoint using OAuth2