User Storage providers are packaged in a JAR and deployed or undeployed to the {project_name} runtime in the same way you would deploy something in the {appserver_name} application server. You can either copy the JAR directly to the `deploy/` directory of the server, or use the JBoss CLI to execute the deployment.
In order for {project_name} to recognize the provider, you need to add a file to the JAR: `META-INF/services/org.keycloak.storage.UserStorageProviderFactory`. This file must contain a line-separated list of fully qualified classnames of the `UserStorageProviderFactory` implementations:
{project_name} supports hot deployment of these provider JARs. You'll also see later in this chapter that you can package it within and as Java EE components.
