Validate customer's web shop user name. API checks that the provided user name is unique — no other customer has such user name yet. If user name is not unique, API returns error 1012, otherwise error code 0 (success).
Use this API call before you assign a web shop user name and password to a customer (API call saveCustomer, fields username and password).
| Parameter name | Description | Possible value | Required |
|---|---|---|---|
| username | string | yes |