Lock screen is different from login screen. And it can appear in two cases in Windows 10 computer.
You can make lock screen looks beautiful but it seems redundant because you cannot use it at most of time especially when you use a Windows 10 PC but not a touch-screen tablet. So if you don't like lock screen to show up, you can disable it with methods told in this article.
If you can set Windows 10 auto login at boot, the lock screen would be bypassed.
Netplwiz would help you to easily configure the automatic login user and password in accessible computer. Type command "netplwiz" in Windows 10 Run box and press Enter to open User Accounts dialog. Select the login user (eg. Administrator) in dialog and uncheck "Users must enter a user name and password to use this computer". In pop-up dialog, enter automatic login user password and click "Apply" button. Then when you reboot Windows 10 computer, you can skip login screen and lock screen and automatically sign in with customized user and password.
Note: But probably there would be risk to your computer while everyone could sign in without user and password. So this is not recommended unless it is your personal computer at home.
Get more ways to automatically sign in Windows 10 without password.
If you don't like to see lock screen after computer is sleep or locked, it is time to disable it and go straight to login screen when computer awakes from sleep or you unlock computer from manual lock.
1. Open the File Explorer and locate folder "Microsoft.LockApp_cw5n1h2txyewy" in C > Windows > SystemApps.
2. Rename the folder with extension ".bak".
Right-click the folder and change the folder extensions to .bak. Hit Enter and if administrator permission is required, just click Continue on pop-up UAC dialog.
With this way, lock screen will become disabled when you wake up computer from sleep. But if you just follow this way, lock screen still exists at computer startup.