I uploaded a build to be reviewed by Apple, I provided them with the username: testing@gmail.com and password: 123456. They failed the build saying that the username and password that I provided didn't work but I copied and pasted the username and passwords and it worked on all devices and emulators. They didn't inform me why it failed, whether it was an invalid email and password or the user did not exist. I used the flutter framework and firebase for authentication. Could someone please point me in the right direction to go I am very confused as to what I have to do now?