wsod, can't connect to database to change theme.

Hello there,

I am fairly new to drupal, and I was following a tutorial on customizing themes. I have my remote server conntected, and I am able to add/change/delete files, but nothing seems to be working. I am still getting the WSOD.

I have tried replacing my enabled theme to an already working theme such as Bartik or Garland. I have tried changing my settings.php, but that doesn’t seem to work. I have tried using drush, but get error issues:

kari:GardenExpo-site Stetson$ drush cache-rebuild
Command cache-rebuild requires Drupal core version 8+ to run.        [error]
The drush command 'cache-rebuild' could not be executed.             [error]
Drush was not able to start (bootstrap) the Drupal database.         [error]
Hint: This may occur when Drush is trying to:
 * bootstrap a site that has not been installed or does not have a
configured database. In this case you can select another site with a
working database setup by specifying the URI to use with the --uri
parameter on the command line. See `drush topic docs-aliases` for
 * connect the database through a socket. The socket file may be
wrong or the php-cli may have no access to it in a jailed shell. See for details.

Drush was attempting to connect to: 
 Drupal version         :  7.50                                     
 Site URI               :  http://default                           
 Database driver        :  mysql                                    
 Database hostname      :  localhost                                
 Database port          :                                           
 Database username      :  wigarden_drup417                         
 Database name          :  wigarden_drup417                         
 PHP configuration      :                                           
 PHP OS                 :  Darwin                                   
 Drush script           :  /usr/local/bin/drush                     
 Drush version          :  8.1.3                                    
 Drush temp directory   :  /tmp                                     
 Drush configuration    :                                           
 Drush alias files      :                                           
 Drupal root            :  /Users/Stetson/Documents/GardenExpo-site 
 Drupal Settings File   :  sites/default/settings.php               
 Site path              :  sites/default     

I have also tried logging into the SQL server, but it says my user is denied permission for some reason, and don’t know how to change that.

Any help would be greatly appreciated! I am out of options. 🙁

Thank you!

Drupal version: