wp-admin login redirecting to home page

Please upload the wp-admin and wp-include folder with the fresh files and remove the old wp-admin and wp-include folder full. and remove the all .htacess files from each and every directory of wp-content folder

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