username
Definition:
A name that identifies a person to a computer, software program, or website. An example of a username is johnsmith or jsmith3498.
Here's a word you may not know...
wi-fi hotspot
A wi-fi hotspot refers to a public wireless Internet connection. Wi-fi hotspots are common in coffee shops, hotels and other places people gather. If you have a laptop or mobile device with built in wireless connectivity, you should be able to easily connect to the Internet using a wi-fi hotspot. It should be noted that not all wi-fi hotspots are free and that some businesses charge a usage fee to use their wi-fi hotspot.