README.md in nulogy_sso-2.3.0 vs README.md in nulogy_sso-2.3.1

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 # NulogySSO
 
 [![Gem](https://img.shields.io/gem/v/nulogy_sso?label=nulogy_sso)](https://rubygems.org/gems/nulogy_sso "View this project in Rubygems")
 
+> **NOTE:** The default branch for this repository was changed to `main`. Please read [this Github blog post](https://github.blog/changelog/2020-10-01-the-default-branch-for-newly-created-repositories-is-now-main/) for more information.
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 ## Auth0
 For more information on Auth0 see the [Auth0 documentation](https://auth0.com/docs/flows/concepts/auth-code#how-it-works).
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+### Authentication Flow
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+The Auth0 docs can be confusing, so we provide [a more detailed picture of the Authentication Flow](https://drive.google.com/file/d/1fbPZR6FmfetRzyQZVz16Hs2rqepY4XJZ/view?usp=sharing) implemented by this gem.
 
 ## Installation
 
 This gem is a Rails Engine. It follows best practices [documented here](https://guides.rubyonrails.org/engines.html).
 