Who is John Titor?

Who was John Titor, the 'time traveller' who came from 2036 to warn us of a nuclear war?
https://www.telegraph.co.uk/news/science/11945420/Who-was-John-Titor-the-time-traveller-who-came-from-2036-to-warn-us-of-a-nuclear-war.html

"It all began in July 1998 on the late-night paranormal radio show Coast to Coast AM when host Art Bell received a series of faxes (yes, faxes) from an alleged American Soldier claiming to have detailed knowledge of time travel. The faxes describe how time travel was invented in the year 2034 and tell of an ominous discovery that no one is able to travel beyond the year 2564."
https://www.ebaumsworld.com/articles/a-look-back-at-john-titor-the-time-traveler/86070404/

"A person named John Titor claimed that he is a Time Traveler from 2036. Some people believe this story but others said, it is a hoax prepared by someone living in Florida."
https://www.sciencetimes.com/articles/11953/20170410/time-traveler-john-titors-popular-predictions-2036.htm

"Titor said that in the year 2036, he had been selected to travel back to 1975, and obtain an IBM 5100, which would help future scientists in decoding a computer program."
https://allthatsinteresting.com/john-titor

"Titor mentioned a “hidden functionality” within the computer that really did turn out to exist. The functionality was likely unknown to the average consumer at the time of his posting, so it’s curious that he would have known such a detail, himself."
https://www.strangerdimensions.com/featured/john-titors-predictions/

"In the posts Titor outlined various futures based on his timeline including a second American Civil War and World War III. The posts captivated the users and became the stuff of legend."
http://www.paranoiamagazine.com/2015/10/john-titor-new-development-as-piece-of-infamous-ibm-computer-goes-on-sale/

"Titor then revealed that he was visiting 2000 for personal reasons, visiting members of his family and collecting pictures that were lost in a civil war in the year 2015.

Titor then claimed in 2001 that he was returning to his own time."
http://www.security-faqs.com/time-travelling-john-titor-a-2036-hoax-or-was-it.html