Remove admin account

db/migrations/002_create_members.rb

@@ -12,7 +12,7 @@ Sequel.migration do
       String :last_name
       String :organization_name
 
-      TrueClass :admin, null: false, default: false
+      TrueClass :core_member, null: false, default: false
 
       index :account_id, unique: true
 
@@ -28,6 +28,9 @@ Sequel.migration do
           "AND last_name IS NULL AND organization_name IS NOT NULL " \
           "AND trim(organization_name) <> '')"
         )
+
+      constraint :members_core_member_individual,
+        Sequel.lit("core_member = FALSE OR kind = 'individual'")
     end
   end