As a gentle reminder, users cannot communicate off Upwork until a contract has been set up on your account (the client sent an offer, and you accepted it). It would also be best to visit these articles for more information on how you can keep in line with Upwork's Terms of Service when engaging on the website:
You may also want to read up on the "Safety First!" section of the freelancer resources we have compiled, these tips for avoiding questionable jobs, this Community article, and these articles for more information about working safely through Upwork.
I hope this helps you work safely on Upwork!