To run the Lemonade Flutter app, you need to set up a .env configuration file containing the required variables. Follow the steps below:

1. Create a .env file in the root directory of the project.
2. Add the following variables to the file and replace <OAUTH_URL> and <CLIENT_ID> with your credentials:

OAUTH2_BASE_URL=<OAUTH_URL>
OAUTH2_CLIENT_ID=<CLIENT_ID>

1. Open a terminal or command prompt and navigate to the project directory.
2. If you haven't enabled Flutter on your machine, visit the Flutter installation guide and follow the instructions for your operating system.
3. Ensure you have the appropriate Flutter devices set up by running flutter devices. If no devices are found or configured, follow the device setup instructions.
4. Run the app by executing flutter run.

With the .env file configured and the app built and run via Flutter, you can now successfully use the Lemonade Flutter app.