PS C:\> mysqld --console
2019-07-12T07:34:04.018684Z 0 [System] [MY-010116] [Server] C:\Program Files\MySQL\MySQL Server 8.0\bin\mysqld.exe (mysqld 8.0.16) starting as process 5836
2019-07-12T07:34:06.598534Z 0 [Warning] [MY-010068] [Server] CA certificate ca.pem is self signed.
2019-07-12T07:34:06.666470Z 0 [System] [MY-010931] [Server] C:\Program Files\MySQL\MySQL Server 8.0\bin\mysqld.exe: ready for connections. Version: '8.0.16'  socket: ''  port: 3306  MySQL Community Server - GPL.
2019-07-12T07:34:06.719417Z 0 [System] [MY-011323] [Server] X Plugin ready for connections. Bind-address: '::' port: 33060

PS C:\Users\Professional> mysql -u root -p
Enter password: ***********
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)

PS C:\Users\Professional> mysql -h localhost -u root -p
Enter password: ***********
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)

 mysql-init.txt 

ALTER USER 'root'@'localhost' IDENTIFIED BY 'ghbrjkzcs';

PS C:\> cd "C:\Program Files\MySQL\MySQL Server 8\bin"
PS C:\> mysqld --init-file=C:\\mysql-init.txt