Host '192.168.43.100' is not allowed to connect to this MySQL server code example

Example 1: Host '192.168.43.100' is not allowed to connect to this MySQL server

CREATE USER 'username'@'localhost' IDENTIFIED BY 'password';

GRANT ALL PRIVILEGES ON *.* TO 'username'@'localhost' WITH GRANT OPTION;

CREATE USER 'username'@'%' IDENTIFIED BY 'password';

GRANT ALL PRIVILEGES ON *.* TO 'username'@'%' WITH GRANT OPTION;

FLUSH PRIVILEGES;

Example 2: host 127.0 0.1 is not allowed to connect to this mysql server

UPDATE mysql.user SET host='%' WHERE user='root';