Login An existent Customer

You can Authenticate you users and get a login token that you can use in future methods with the login() method like this:

Using await/async:

String loginToken = await YouCan.instance.customers.login(
        email: "YOUR EMAIL HERE",
        password: "YOUR PASSWORD HERE",
      );

if the user with that email and password exists, a token will be returned to you, you can save it and use it to get the full user informations and manage it in the next methods.