Requirements
You must have an active Sage Intacct Web Services developer license, which includes a Web Services sender ID and password.
A sender ID can be authorized for more than one company and can be tracked through an audit history report.
In addition, the administrator for the target company must:
· Enable the Web Services subscription using Company > Admin > Subscriptions.
· Authorize your Web Services sender ID for the company.
· Create your user ID. Typically, this will be a Web Services user account, which does not include UI access (see Web Services users in the Sage Intacct product help). Web Services users exchange information programmatically with the Sage Intacct via Web Services API calls. Web Services users are automatically limited to the API through Web Services access only, meaning they can't log in to your company through the UI. Additionally, a Web Services user does not grant you access to use Web Services itself. A Web Services sender ID is an additional credential which is required to send requests to a Web Services endpoint. A sender ID can be authorized for more than one company and can be tracked through an audit history report. You can obtain a sender ID by contacting your Sage Intacct account representative.
How to add web service users?
References:
https://developer.intacct.com/web-services/