Can be accessed from User Settings → Post to Twitter on the top menu bar.
 

Before you go ahead, please confirm that you've connected your Twitter ID with Wavespot.
 

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In this page, you can configure the message that shall automatically be tweeted out when someone logs into Wavespot at your premises and starts using free Internet.
 

For example, if a customer named Shayon just logs into your location named Coffee Bean Cafe, then the following setting shall send out an automatic tweet that says -

Shayon has checked into Coffee Bean Cafe, and is currently online using Free Internet from #WavespotWiFi