basic usage for wds twitter widget (outside a widget)

wds-twitter-usage.php

<?php 

wds_twwi_disable_widget_app_settings( array(
    'consumer_key'        => 'YOUR CONSUMER KEY',
    'consumer_secret'     => 'YOUR CONSUMER SECRET',
    'access_token'        => 'YOUR ACCESS TOKEN',
    'access_token_secret' => 'YOUR ACCESS TOKEN SECRET',
) );

add_filter( 'wds_twwi_do_widget', '__return_false' );


function wds_get_tweets( $settings = array() ) {

	$tw_app = TwitterWP::start()->get_app_creds();

	$defaults = array(
		'twitter_id'           => '', // twitter username
		'twitter_num'          => 1, // number of tweets
		'twitter_duration'     => 60, // transient cache duration
		'twitter_hide_replies' => 0, // Show user's @replies
		'show_time_stamp'      => 0, // Show tweet timestamp
		'follow_link_show'     => 0, // Show a 'follow user' link
		'follow_link_text'     => '', // Text for follow_link_show link
		'consumer_key'         => $tw_app[0], // 
		'consumer_secret'      => $tw_app[1],
		'access_token'         => $tw_app[2],
		'access_token_secret'  => $tw_app[3],
	);

	$settings = wp_parse_args( $settings, $defaults );

	return WDS_Twitter::get_tweets( $settings );
}

function wds_do_tweet( $settings = array() ) {
	$tweets = wds_get_tweets( $settings );
	foreach ( $tweets as $tweet ) {
		echo $tweet;
	}
}

Or to have the plugin handle the output:

/**
 * Display WDS Twitter Widget
 */
function wds_display_twitter_widget() {

    if ( ! class_exists( 'WDS_Twitter' ) ) {
        return;
    }

    $settings = array(
        'twitter_id'           => '', // twitter username
        'twitter_num'          => 1,  // number of tweets
        'twitter_duration'     => 60, // transient cache duration
        'twitter_hide_replies' => 0,  // Show user's @replies
        'show_time_stamp'      => 0,  // Show tweet timestamp
        'follow_link_show'     => 0,  // Show a 'follow user' link
        'follow_link_text'     => '', // Text for follow_link_show link
        'consumer_key'         => 'YOUR CONSUMER KEY',
        'consumer_secret'      => 'YOUR CONSUMER SECRET',
        'access_token'         => 'YOUR ACCESS TOKEN',
        'access_token_secret'  => 'YOUR ACCESS TOKEN SECRET',
    );

    WDS_Twitter::tweets_list( $settings );
}

^ to return the output rather than echo it, change the last line to:
return WDS_Twitter::get_tweets_list( $settings );