Please help..

[Shalabyer]

can't register any email in the app to view it.
it says Error while fetching data

[Shalabyer]

i've found this code for flutter home automation applicaion.
but it was wrote in an older vversion of flutter, which i tried many times to start it but i couldnt make it,
last best thing that i have ever came to was the application was starting but when i try to sign up a new mail inside it it says,
Error fitching data.
It dosnt use firebase to store email it just uses a sql package.
if any one can help to git the code and upgrade it for me to use it i will be very thankful :D.
Here is the link,
https://github.com/mlinarevicMateo/home-automation-flutter