Your usage of SQL_ThreadQuery is wrong. You can't format string in SQL_ThreadQuery. You have to do it before.
Code:
SQL_ThreadQuery ( Handle:cn_tuple, const handler[], const query[], const data[]=0 )
Code:
static query[256];
format(query, 255, "SELECT job FROM users WHERE steamid='%s'", authid);
SQL_ThreadQuery(sql_get_handle(),"QueryHandle", query)
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