Help with PayPal with SSL integration in Flutter App with Flask Server, Celery and Redis

I am looking for help with integrating PayPal into my Flutter App. Unfortunately, currently there is no working integration at all. The App is mostly completed, however, I now need SSL certificate help in order to get things up and running. As far as timeline is concerned, I need the project completed within 2 days. If you think you are up for the challenge and have proven experience with PayPal integration, please apply for the job. I am looking for an experienced professional to help set up the integration and resolve any problems I may be facing along the way.