IdpSelectionLoginContext
Provides the original target URI for the request received by IG. Use this context
with loginHandler in
AuthorizationCodeOAuth2ClientFilter.
Properties
The context is named idpSelectionLogin and is accessible at
${contexts.idpSelectionLogin}. The context has the following property:
"originalUri": URI- 
The original target URI for the request received by IG. The value of this field is read-only.