```ruby
require "promise_pay"

PromisePay.api_user = "<%= email %>"
PromisePay.api_key  = "<%= token %>"
PromisePay.env      = :<%= env %>
```

Add fee_ids field to config generator
user
```ruby
require "promise_pay"

PromisePay.api_user = "<%= email %>"
PromisePay.api_key  = "<%= token %>"
PromisePay.env      = :<%= env %>
PromisePay.fee_ids  = ""
```
assistant