public UpdateUserResult withUserName(String userName) {
        setUserName(userName);
        return this;
    }
<p>
The unique identifier for a user that is assigned to a server instance that was specified in the request.
</p>

@param userName
       The unique identifier for a user that is assigned to a server instance that was specified in the request.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-transfer/src/main/java/com/amazonaws/services/transfer/model/UpdateUserResult.java