def validSignup():
dialog = MDDialog(
title="You have successfully signed up",
text="You can go back to the log in page to start using the app")
dialog.width = "250"
dialog.open()
def invalidSignup():
dialog = MDDialog(title="Invalid email or password",
text="The password has to contain at least 6 characters")
dialog.width = "250"
dialog.open()
def invalidLogin():
dialog = MDDialog(title="Invalid e-mail or password",
text="Please try again")
dialog.width = "250"
dialog.open()