Inserting current user ID into Post for Author

You need to use the global variable for the user ID (if you actually need to use it) somewhat like this:

global $user_ID;
get_currentuserinfo();

The get_currentuserinfo() call will populate the global $user_ID variable which you can then use directly, as you have it in your args currently.

Reference

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)