Sensitive files/ data exists post deletion of user account

In the latest android app ,I created an account in the name of [email protected]. After few activities,deleted the account . Files containing user emails and tokens still exist.Relevant files not deleted upon deletion of account. Content of files post deletion of account: generic_x86:/data/data/com.nextcloud.client/shared_prefs # ls FirebaseAppHeartBeat.xml WebViewChromiumPrefs.xml com.google.android.gms.appid.xml com.nextcloud.client_preferences.xml migrations.xml variant-emoji-manager.xml generic_x86:/data/data/com.nextcloud.client/shared_prefs # cat com.nextcloud.client_preferences.xml <?xml version='1.0' encoding='utf-8' standalone='yes' ?> <map> <boolean name="keysMigration" value="true" /> <string name="select_oc_account">[email protected]@us.cloudamo.com</string> <boolean name="autoUploadPathUpdate" value="true" /> <boolean name="autoUploadInit" value="true" /> <int name="prefs_uploader_behaviour" value="1" /> <boolean name="storagePathFix" value="true" /> <boolean name="autoUploadEntriesSplitOut" value="true" /> <boolean name="keysReinit" value="true" /> <string name="pushToken">euwTiu9CT3CvQNHqNVZPIk:APA91bHqkGjFhx-BiCEH_NcRnaEvrp21tbxvjOKhHrQ1mUTCW3Dp46X90YinSDcjfVXytTcT9CLQBcrOv5J_EfSGM7GbZrZAyeKC1xOtgNBLkFeo4_EqX7LqVW-ezuG_rou1y2Ux8ah5</string> <float name="grid_columns" value="3.0" /> <string name="storage_path">/storage/emulated/0/Android/media/com.nextcloud.client</string> <boolean name="legacyClean" value="true" /> <string name="upload_from_local_last_path">/storage/emulated/0/Pictures</string> <int name="lastSeenVersionCode" value="30160190" /> </map> Images folder generic_x86:/data/data/com.nextcloud.client/shared_prefs # cd /storage/emulated/0/Pictures generic_x86:/storage/emulated/0/Pictures # ls 2131099731.jpg 2131099732.jpg 2131099733.jpg ## Impact This information could be misused as sensitive token related ,images,user related details exist inspite of user account being deleted.