Here is a quick guide for you to create google slide with api.
- Go to Create a Google Cloud project and click the "Go to Create a Project" button
- Go to Enable the APIs you want to use and click the "Go to Product Library" button
- Go to Configure OAuth consent and click the "Go to OAuth consent screen" button
- Go to Create access credentials and click the "Go to Credentials" button
- Go to Google Slide API Doc and choose the language you want.