Hi,
I am looking for something already developed that would allow simple user verification or curation for an app that relies on crowd-sourced data. There would have to be some way that users can login and that userID is tracked, so they cannot just troll, submit 1000 entries, and mess up the data set.
Neal
A login template by eiXerITS
you can use the same logic also for other databases
Taifun
Trying to push the limits! Snippets, Tutorials and Extensions from Pura Vida Apps by 
Taifun.
You’re saying just store a username in one of the cells of the spreadsheet and check for that? They could still just make up new usernames. There needs to be some form of login. I thought that maybe google makes their sign-in easy to integrate, but I do not know a lot about this.
Use Firebase Authentication…