...
name (Required). String. Either the first, last name or both must be present.
login (Optional). String. Login name of the user. If login is present, the user will be counted towards your license count.
password (Optional). String. Password of the user.
email (Optional). String. Email of the user. For users with login, email is mandatory.
role_ids (Optional). String. A comma separated string of role ids.
bill_rate(Optional). A decimal value specifying the billing rate of the new user.
cost_rate (Optional). A decimal value specifying the cost rate of the new user.
phone(Optional). A numeric value.
calendar_id(Optional). The name or ID of the work calendar with which the new user is to be created.
keywords(Optional). String String.
custom_field_1 (Optional). The custom field attached to user. You need to use the Formula Key of the custom field.
Return values
user_id
When your data format is XML, you should post something like this:
...