public void setAssociationDate(String associationDate) {
        this.associationDate = associationDate;
    }
<p>
The date a user was associated with an EC2 instance.
</p>

@param associationDate
       The date a user was associated with an EC2 instance.
aws-java-sdk-licensemanagerusersubscriptions/src/main/java/com/amazonaws/services/licensemanagerusersubscriptions/model/InstanceUserSummary.java