On most phones, you can't recover your lockscreen password/PIN/pattern via email. For Samsung phones, you can remotely unlock using Samsung's Find My Mobile, but I don't think Huawei has anything like that. You'll just have to try to remember the pattern. Otherwise, you'd have to do a hardware key factory reset of the phone, then set it up again. This is when you'd have to enter your Google account/password, since it would trigger Factory Reset Protection.