FusionAuth is an authentication system that provides user management and registration capabilities. It allows developers to build custom registration forms to capture specific information from users, such as password, first name, phone number, geographic area of interest, minimum house price, and maximum house price. The form fields can be customized, including adding custom fields and reordering the existing ones. The registration process involves two steps: one for basic account information and another for additional information related to the user's home buying needs. FusionAuth provides APIs for managing registration forms programmatically. Once a form is created, it can be associated with an application and reused across different applications or managed without writing code. After completing the registration process, users are redirected to a configured URL, and their account information is available in the administrative user interface. However, there's a need to improve the theme of the placeholders for better user experience.