This custom web part helps user to Login/Register using Twiiter OAuth with basic info (like Name, Email)
To install this web part, import the zip archives included in the download package from the Sites application: https://docs.kentico.com/k11/deploying-websites/exporting-and-importing-sites/importing-a-site-or-objects. Please ensure that "Import code files" is checked in step 2 of the process.
In the download package, you will also find the installation doc file that will help you in configuration of this web part in your Kentico site.