ERROR 1410 (42000): You are not allowed to create a user with GRANT

It's weird, this should be working because you used the root user, can you please run this command to make sure that the user is created successfully?

USE mysql; 

then get the users table using 

SELECT user FROM user;

take a look at the table and see if your user exists or no, If no please create it like this 

CREATE USER 'mo-atef'@'localhost' IDENTIFIED WITH mysql_native_password BY 'password';

then you can Grant the privileges using this command 

GRANT CREATE, ALTER, DROP, INSERT, UPDATE, DELETE, SELECT, REFERENCES, RELOAD on *.* TO 'mo-atef'@'localhost' WITH GRANT OPTION;

Good luck