LoginStateModel.java

@AutoValue
public abstract class LoginStateModel {

    public static Builder builder() {
        return new AutoValue_LoginStateModel.Builder();
    }

    public abstract Builder toBuilder();

    public abstract LoginState getLoginState();
    
    @Nullable
    public abstract User getLoggedInUser();

    @Nullable
    public abstract Throwable getLoginException();
    
    @AutoValue.Builder
    public static abstract class Builder {

        public abstract Builder setLoginState(LoginState loginState);

        public abstract Builder setLoginException(Throwable loginException);
        
        public abstract Builder setLoggedInUser(User user);
        
        public abstract LoginStateModel build();
    }
}