Redirect the user to the login screen. Passing an identityProvider is
optionally, it will allow users to skip the login page and be directed
straight to that providers login page
Example
// OPtionally pass a constidentityProvider = 'Google' awaitauthService.loginHostedUI(identityProvider) // User will be redirected to login page or promise will resolve
Redirect the user to the login screen. Passing an
identityProvideris optionally, it will allow users to skip the login page and be directed straight to that providers login pageExample