The authentication package provides a simple interface to authenticate users in a Joomla Framework application. It is completely decoupled from the application class and provides the ability to implement custom authentication strategies.

Add "joomla/authentication": "~3.0" to the require block in your composer.json and then run composer install.

{ "require": { "joomla/authentication": "~3.0"	} }

Alternatively, you can simply run the following from the command line:

composer require joomla/authentication "~3.0"

If you want to include the test sources and docs, use

composer require --prefer-source joomla/authentication "~3.0"