public void setUserName(String userName) {
        this.userName = userName;
    }
<p>
The user's user name. This value is required if you are registering a user that will be managed in Amazon
QuickSight. In the output, the value for <code>UserName</code> is <code>N/A</code> when the value for
<code>IdentityType</code> is <code>IAM</code> and the corresponding IAM user is deleted.
</p>

@param userName
       The user's user name. This value is required if you are registering a user that will be managed in Amazon
       QuickSight. In the output, the value for <code>UserName</code> is <code>N/A</code> when the value for
       <code>IdentityType</code> is <code>IAM</code> and the corresponding IAM user is deleted.
aws-java-sdk-quicksight/src/main/java/com/amazonaws/services/quicksight/model/User.java