Fixed issue with account.rb for spam_flag to include nil by default

• Fixed:
- issue with account.rb for spam_flag to include nil by default

Was causing failure to account sign up where new values are nil and the validation failed because it expected 0,1,2 values.

app/models/account.rb

@@ -70,7 +70,7 @@ class Account < ApplicationRecord
  include DomainNormalizable
 
  SPAM_FLAG_CLASS_MAP = {
- none: 0,
+ none: nil,
  spam: 1,
  safe: 2,
  }.freeze