How to use validators without interfering with the construction of selects?

I set up an email rule to test if the email is unique but the prefix in the rule is damaging the database query construction

here is my rule

class Store {
  get rules () {
    return {
      'company.billing_email': 'required|email|unique:organizations'
    }
}

here the sql error generated

field: "company.billing_email"
message: "select * from "organizations" where "company"."billing_email" = $1 - missing FROM-clause entry for table "company""
validation: "ENGINE_EXCEPTION"

how can i assemble this rule without the prefix generating a problem in sql?

the answer to my question is in the documentation but not very clearly

https://adonisjs.com/docs/4.1/validator#_custom_rules

the last field tells you what the column name should look like, the corrected rule is this

'company.billing_email': 'required|email|unique:organizations,billing_email',

att,