mysql> show create user `mysql.sys`@localhost;

+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

| CREATE USER for mysql.sys@localhost                                                                                                                                          |

+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

| CREATE USER 'mysql.sys'@'localhost' IDENTIFIED WITH 'mysql_native_password' AS '*THISISNOTAVALIDPASSWORDTHATCANBEUSEDHERE' REQUIRE NONE PASSWORD EXPIRE DEFAULT ACCOUNT LOCK |

+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

1 row in set (0.00 sec)

mysql> CREATE USER 'mysql.XXX'@'localhost' IDENTIFIED WITH 'mysql_native_password' AS '*THISISNOTAVALIDPASSWORDTHATCANBEUSEDHERE' REQUIRE NONE PASSWORD EXPIRE DEFAULT ACCOUNT LOCK;

Query OK, 0 rows affected (0.00 sec)

mysql> CREATE USER 'mysql.YYY'@'localhost' IDENTIFIED WITH 'mysql_native_password' AS '*WALKISNOTAVALIDPASSWORDTHATCANBEUSEDFOOD' REQUIRE NONE PASSWORD EXPIRE DEFAULT ACCOUNT LOCK;

Query OK, 0 rows affected (0.00 sec)

mysql> CREATE USER 'mysql.XXX'@'localhost' IDENTIFIED WITH 'mysql_native_password' AS 'maybe this can be anything' REQUIRE NONE PASSWORD EXPIRE DEFAULT ACCOUNT LOCK;

ERROR 1827 (HY000): The password hash doesn't have the expected format. Check if the correct password algorithm is being used with the PASSWORD() function.

mysql>  CREATE USER 'mysql.ZZZZ'@'localhost' IDENTIFIED WITH 'mysql_native_password' AS '!WALKISNOTAVALIDPASSWORDTHATCANBEUSEDFOOD' REQUIRE NONE PASSWORD EXPIRE DEFAULT ACCOUNT LOCK;

ERROR 1827 (HY000): The password hash doesn't have the expected format. Check if the correct password algorithm is being used with the PASSWORD() function.

mysql>  CREATE USER 'mysql.ZZZZ'@'localhost' IDENTIFIED WITH 'mysql_native_password' AS '*WALKISNOTAVALIDPASSWORDTHATCANBEUSEDfood' REQUIRE NONE PASSWORD EXPIRE DEFAULT ACCOUNT LOCK;

Query OK, 0 rows affected (0.00 sec)