The phrase "a user discovered" is correct and usable in written English.
It can be used when referring to an individual who has found or identified something, often in the context of technology or software.
Example: "In the latest update, a user discovered a bug that caused the application to crash unexpectedly."
Alternatives: "an individual found" or "a person identified".
Last night, around midnight Pacific time, a user discovered this forum and posted a message.
"A user discovered an offensive GIF sticker in our library, and we immediately removed it per our content guidelines.
In December a user discovered an Achilles heel in Facebooks security and decided to go public with it, showing how you could expose a users private photos by reporting one of their public photos as abusive; Facebook then offered the users other private photos to flag any that were similarly abusive.
Google is so effective at helping us find relevant information that skeptics caution that even if a user discovers something online to buy, he or she will likely visit Google to find it.
That may be something along the lines of allowing offline viewing of some shows, which it began in November this year, or it may be improved recommendation engines to help a user discover that they like Twin Peaks as much as they'd like American Vandal.
If a user discovers a good combination of features to use for priors, it may be desirable to repeat the same procedure to analyze other sequence sets as well.
A Reddit user discovered a 10/10 Dragon Age II Metacritic user review written by someone with the handle Avanost.
In one set of slides near the end of the presentation, he shows a use case where a user discovers music on Yahoo, links to purchase it at Amazon, and then manages it again back at Yahoo.
An eagle-eyed user discovered a page for the French duo on Lollapalooza's website, which was built in February, suggesting that they were booked to play the 2017 edition of the Chicago festival (via NME).
But when a Google Maps user discovers an error, like that Disney hotel, he or she can report it directly from the smartphone.
This approach is two-fold: as an AFM-unexperienced user discovering its principle of operation at nanoscale or as a future engineer understanding its multi-disciplinary structure involving mechanics, optics, electronics, software and control sciences.
