In case you have forgotten your My Eyes Only password, then don't worry you can reset your password but keep in your mind that all your My Eyes Only snaps or pictures will be permanently deleted. So follow the steps to reset the My Eyes Only password -
1. Open the My Eyes Only and Click "Options" in the bottom right of your screen.
2. Click on "Forgot Passcode".
3. Now, enter your Snapchat account password and tap Next.
4. Read the information, and if you agree, tap the circle icon and tap 'Continue'
5. Now, create a new passcode and confirm it

For more read - https://onlinegeeks.net/recover-my-e...s-on-snapchat/