public void setUserName(String userName) {
        this.userName = userName;
    }
<p>
The name of the user assigned to one or more servers. User names are part of the sign-in credentials to use the
Transfer Family service and perform file transfer tasks.
</p>

@param userName
       The name of the user assigned to one or more servers. User names are part of the sign-in credentials to
       use the Transfer Family service and perform file transfer tasks.
aws-java-sdk-transfer/src/main/java/com/amazonaws/services/transfer/model/DescribeUserRequest.java