Open Google Drive.
Click the Settings icon (the gear wheel - top right of the page).
Click Settings.
Select Manage Apps.
Scroll to Lumin.
Click Options.
Select Disconnect from Drive.
Click Disconnect.
Click Done
Disconnect the Lumin app from the settings in Google Drive.
Open Google Drive.
Click the Settings icon (the gear wheel - top right of the page).
Click Settings.
Select Manage Apps.
Scroll to Lumin.
Click Options.
Select Disconnect from Drive.
Click Disconnect.
Click Done