Google Drive : File Uploading and Accessing the files

Can anyone help me the google drive [long term validity] refresh token,

1. Refresh token getting expired every week, we wanted to fix and the refresh token permanently.
2. Google project status is internal,application status
3. using Laravel package : nao-pon/flysystem-google-drive
4. Using Laravel Application.

Please Help me through this, Thanks in Advance.

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