Learn how to implement a login authentication flow in React Native with this step-by-step tutorial. Create a Sign In screen with custom inputs for username and password, design custom buttons for Sign In, Forgot Password, and Social Media authentication, and set up the project structure for a React Native application. Explore logo implementation, input field customization, and button styling while preparing for advanced features like Sign Up, Account Creation, and Password Reset to be covered in the subsequent part of the series.