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So let me quickly implement the Login page button, right?

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The Login page button is just here.

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So on_press root.go_to_login.

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And that's how, I would call the function.

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And so we are in the SignUpScreenSuccess

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rule, which means we need to go to the

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SignUpScreenSuccess class and define the go_to_login function, self

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and of course self.manager.current equal to

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the login_screen, which is this one in here.

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So we already have that screen, we

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don't have to create a new screen.

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Now, to save the kivy file and

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execute Sign Up, u6, p6,

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it doesn't matter what username and

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password you Submit, Sign up successful!.

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That's a label Login page and it

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takes you back to the Login screen.

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Now, something to keep in mind is the

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direction of the transition of the screens.

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So currently by default, the transition is called left.

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So you go Sign Up.

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So the movement is that, the next

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screen is going towards the left.

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So u8, p8, now the next screen will go towards the left like that.

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And when you go to Login, maybe

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you'd want to go to the right.

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So to change the transition to

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the right, which makes more sense.

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So if you want to do that, go

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to where you are setting the current screen.

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And so we want to change

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the transition of the login_screen.

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So when we set the current screen

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as login, we want that the manager.transition.direction is right,

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execute that, Sign up.

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I'm just going to Submit some empty strings there, just

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to be quick with this, trying out all the interface.

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So Submit, then, that's a new user

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with empty strings, it doesn't matter.

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You can put some restrictions later if you like.

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So go to the Login page.

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And so this time, the next screen is

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coming from the left towards the right.

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So if that is what you want, which I

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think it makes some sense, then you need to

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use this transition, property of the manager property, which

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has a direction property and set it to right.

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Now that's the idea.