settings(change): changed default value for allow sign up to false, closes #8743, and changed default option allow_org_create to false

conf/defaults.ini

@@ -184,10 +184,10 @@ snapshot_TTL_days = 90
 #################################### Users ####################################
 [users]
 # disable user signup / registration
-allow_sign_up = true
+allow_sign_up = false
 
 # Allow non admin users to create organizations
-allow_org_create = true
+allow_org_create = false
 
 # Set to true to automatically assign new users to the default organization (id 1)
 auto_assign_org = true