First if you set an alternate password you can use that. Your next step is Android Device Manager for your device and your Google account. You can use Android Device Manager and your Google account password to unlock your phone if set up. If not you need to do an FDR (factory data reset). If your data is backed up to Google you will be able to restore with no lost. If not your data will be lost.
After a certain number of failed log in attempts you can enter you Google log in info usually no?
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