Log in as an admin. Visit ‘Site administration’ > ‘Plugins’ > ‘Authentication’ > ‘Manage authentication’. Enable the Shibboleth plugin. Click on ‘Settings’ next to ‘Shibboleth’. Fill in the ‘Username’ field - it can be anything, we aren’t testing a Shibboleth connection. Fill in the parameter 'Authentication method name'. Add an ‘Authentication method logo’. Log out. Visit the login page and confirm there is a new button with the text you added for the 'Authentication method name' setting with a logo next to it.