Doubt in running Asana Java sdk

To run the asana java SDK I am using mvn commands, starting from “mvn install” to “mvn test” I didn’t get any error but while executing this command ( ```
mvn exec:java -Dexec.mainClass=“com.asana.examples.ExampleCreateProjectAndStreamEvents”

           It is showing me an error of "org.apache.maven.lifecycle.LifecyclePhaseNotFoundException:" 

what should I do?