public void setUsername(String username) {
        this.username = username;
    }
<p>
The username of the ActiveMQ user. This value can contain only alphanumeric characters, dashes, periods,
underscores, and tildes (- . _ ~). This value must be 2-100 characters long.
</p>

@param username
       The username of the ActiveMQ user. This value can contain only alphanumeric characters, dashes, periods,
       underscores, and tildes (- . _ ~). This value must be 2-100 characters long.
aws-java-sdk-mq/src/main/java/com/amazonaws/services/mq/model/DeleteUserRequest.java