The Account menu is used to manage and remove all registered accounts on the LG smartphone. In addition to the standard accounts, this menu also lists accounts from Facebook, WhatsApp and other apps. If the account is removed here, data such as chat messages, photos, etc. may also be deleted from the device. The app where the account was registered remains installed.

Android 9 | LG UX 9.0
Step 1:  Open the  Settings
Step 2:  Tap on  General
Step 3:  Tap on  Accounts
Step 4:  Tap on desired  Account
Step 5:  Tap on  Remove account
Step 6:  Confirm with  Remove
  1. Open the Settings
  2. Tap on General
  3. Tap on Accounts
  4. Tap on desired Account
  5. Tap on Remove account
  6. Confirm with Remove

LG Instructions