Changes

• Feature: Added secrets count to GET admin/user/ response
  
• Other: Removing requirement for private and secret keys in group memberships
  
• Other: Some refactoring
  
• Other: Adding is_staff field required for...
  
• Bugfix: Adding sane default SMTP timeout now 10 seconds
  
• Bugfix: Fixing /share/ endpoint fires an abnormal amount of SQL queries
  
• Security: Some library upgrades for libraries with vulnerabilities