get_term_by seems to be failing

get_term_by() returns object by default. Which should end up in Catchable fatal error: Object of class stdClass could not be converted to string if you try to echo it. Likely you have errors suppressed.

Try var_dump( $term ); instead of echo.

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