[ComDuck]

Код:

new query[72+MAX_PLAYER_NAME+32];

Код:

mysql_format(handle, query, sizeof(query), .... VALUES ('%s', MD5('%s'), 0, 0)", ... );

Why are you using MD5 without salting it? Let alone even using MD5 in the first place

Код:

mysql_query(handle, query);

mysql_query is deprecated. Please use the latest version of the MySQL plugin and the much safer natives that come with it.

I agree with ******, switch to a ready-made user management system that is more secure than this one. Or learn how to make a better one on your own with the latest functions.