Lock Screen Pattern

Backup all the data incase your phone gets lock and you have to factory reset.

login to website using your Samsung account
https://findmymobile.samsung.com/
Reset the lock and Restore your data

If you have access to your google account then perform a hard reset. Restore Phone Backup using SmartSwitch.

follow the instructions below:
https://www.samsung.com/in/support/mobile-devices/how-can-i-unlock-my-galaxy-device-if-i-forgot-the-security-pin-pattern-or-password/

Dear Samsung Member,

Greetings from Samsung Customer Support!

We acknowledge your query and apologize for the same. We request you to kindly visit the service center for a physical inspection of your device. You can locate your nearest service center with this given link: https://www.samsung.com/in/support/service-center/

Thank you for writing to Samsung.

Warm Regards,
Samsung Customer Support