Overview The Host Agency Log In page is used to enter login credentials. Before access is granted to the Online Registration system, valid login credentials must be provided. Host agency login credentials are defined either by SPC personnel at the time they are entered into SPC's internal system, or, by the host agency themselves through the Online Registration system's account creation process. To gain access to this system, enter a User Name and Password, then press the Enter key, or, click on the "Log In" button.