You can easily set up an account system through Amazon Cognito that can store user data with industry standard authorization and authentication using OAuth 2.0 and OpenID Connect!
link to plugins: https://www.unrealengine.com/marketplace/en-US/profile/Block+Chop+Studios
full documentation: http://blockchopstudios.com/documentation/
set up gamelift: https://www.youtube.com/watch?v=H-lhaPSoIL8&t=1s
join our discord server! https://discord.gg/NvHYPRS