To modify the background of the login/signup screen for AWS Amplify/Cognito, you can follow these steps:
- Go to your AWS Amplify Console and select your app.
- Navigate to the "Auth" section and click on "Edit".
- Click on the "Customize" button under "UI customization".
- Select the "Background" option.
- Choose a background color or upload an image for the background.
- Click on "Save" to apply the changes.
Note: The customization options available may vary depending on the authentication provider you are using with Amplify/Cognito.