As a plugin developer you can use this plugin as dependency of your plugin by adding a dependency tag to your POM.
To add the latest version of this plugin as a maven dependency, use the following:
<dependency>
<groupId>com.cloudbees.jenkins.plugins</groupId>
<artifactId>amazon-ecr</artifactId>
<version>1.161.v1a_1e8df852d6</version>
</dependency>