How to create a login with spreadsheets without Device ID?


I’m willing to create my first application in Kodular and I’d like it to have a sign in / sign up page as the picture shows:

I was able to create with spreadsheets the sheet for login, password and other informations and linked it to the sign up screen and it’s working perfectly. However, I’m getting some trouble for making the login page work connected with that sheet. I don’t know what is wrong with my code so if anyone could help me it would be great. I don’t want to do it with Device ID (which is the only way that I found online).

Here is the code

Welcome to Community, try this

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can you make a tutorial video for this