Function SignInBackButton

SignInBackButton(props: SignInBackButtonProps): null | Element
A button to go back to the previous step of the sign-in flow.
Parameters
- props: SignInBackButtonProps
  The props for the component.
  
  A button to go back to the previous step of the sign-in flow.
  - Optionalstep?: "credentials" | "verification"
    If set, will render the back button for this step of the sign in flow, regardless of the context value.
  - Optionalsize?: ButtonSize
    The size of the button.
  - Optionalvariant?: ButtonVariant
    The variant of the button.
Returns null | Element
The sign-in back button.
Example
```
function App() {
  // Customize the back button icon and label
  return (
    <CDPReactProvider config={config} theme={themeOverrides}>
      <SignIn>
        <SignInBackButton aria-label="go back">
          <MyCustomIcon />
        </SignInBackButton>
        <SignInImage />
        <SignInTitle />
        <SignInDescription />
        <SignInForm />
        <SignInFooter />
      </SignIn>
    </CDPReactProvider>
  );
}
```