BLUF: There is not a way to unlock your phone if you forget your lock pattern. You will have to factory rest your phone in the recovery mode to recover access to your phone, AND you will lose everything!
Yesterday I changed the pattern lock on my phone...I did it before I went to bed (I regularly change the pattern so my kids cannot access my phone and play games). Unfortunately this morning when I woke up, I forgot my pattern. In previous versions of this phone, I could simply use a backup pin or use my google account credentials to unlock the phone if I forgot my new pattern. This phone - NOT ANYMORE. After several failed attempts...1 minute lockout, then 5 min, 15 min, 30 min, and finally 60 minutes between each failed attempt. You will be forced to factory reset your phone.
Using Google services > Android device manager ...DOESNT WORK...you can send the command to lock the device with the Android device manager (from a desktop computer) and specify a new password, but it does not override the built-in pattern lock and you cannot enter the password to unlock the device.
I really don't think that Samsung had intended to completely lock you out of your phone without being able to use Google's built-in android services to override the lock pattern. I suspect that it's a bug, but if it's not....be very careful using a pattern for your lock screen.
Fingerprint lock screen has been hit/miss...if you have dirty fingers or work with your hands (wood work, golf, etc), the pattern of your fingerprint will sometimes fail to register because of the calluses.
I just finished resetting my phone and it really sucks to loose settings and have to reenter every account password and application setting to get your phone back in working order (several wasted hours). Samsung needs to look at this issue and find a better way to recover access to your phone.