There are three options for you:
1, Maybe your password isn’t correct, so please try to remember or check your correct password.
2. When we set up our iPhone, we’ll also set our Touch ID with fingerprint to unlock our iPhone, if yes, you can use your correct fingerprint to unlock it.
3. if your password is correct, and you haven’t set Touch ID with fingerprint to unlock your iPhone, you can try to restore your iPhone with iTunes to unlock your iPhone.