[Renate]

No, the mmkv files are the actual "database". I made a "walker":

Key: GOOGLE_DRIVE_CLIENT_KEY   // There are 15 copies of this which are inactive
Value 406 bytes:
{
  "installed": {
    "client_id": "long-secret-string.apps.googleusercontent.com",
    "project_id": "kreader-1234567890",
    "auth_uri": "https://accounts.google.com/o/oauth2/auth",
    "token_uri": "https://oauth2.googleapis.com/token",
    "auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
    "client_secret": "24-chars-gobble-dee-gook"
  }
}
Key: GOOGLE_DRIVE_CLIENT_KEY   // This is the only active data in the whole file
Value 406 bytes:
{
  "installed": {
    "client_id": "long-secret-string.apps.googleusercontent.com",
    "project_id": "kreader-1234567890",
    "auth_uri": "https://accounts.google.com/o/oauth2/auth",
    "token_uri": "https://oauth2.googleapis.com/token",
    "auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
    "client_secret": "24-chars-gobble-dee-gook"
  }
}Key: GOOGLE_DRIVE_CLIENT_KEY   // There are 2 copies of this which are inactive
Value 406 bytes:
{
  "installed": {
    "client_id": "long-secret-string.apps.googleusercontent.com",
    "project_id": "kreader-1234567890",
    "auth_uri": "https://accounts.google.com/o/oauth2/auth",
    "token_uri": "https://oauth2.googleapis.com/token",
    "auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
    "client_secret": "24-chars-gobble-dee-gook"
  }
}

So you have 18 copies of the same thing, one copy marked as active.