User Authentication Failed on CreateEnvelope - docusignapi

Question

I encountered a new issue today when I tried to send a request with my new production account and the integrator key, newly promoted to Live status.
The API login succeeded, and it returns my AccountID.
However, when I try to create an envelope with envelopesApi.CreateEnvelope API call, I received the following error.
I tested the code with my demo account and key, couple of days ago. It was working fine. I think it is related to the key, because the login request was succeed.
DocuSign.eSign.Client.ApiException: 'Error calling CreateEnvelope: {
"errorCode": "USER_AUTHENTICATION_FAILED",
"message": "One or both of Username and Password are invalid."
}
Please let me know if there is anything else I need to do.

Answer 1

Often when the USER_AUTHENTICATION_FAILED error is received and you are positive the correct user/pwd combo is being provided it's because of the wrong account endpoint being accessed.
You need to parse sub-domain of the baseUrl that is returned from the Login API (property is called base_uri if using OAuth2) and configure your api client with that sub-domain.
When testing in demo it's ok if you miss this step since all accounts are under the demo.docusign.net sub-domain, however in production there are multiple sub-domains (ie. www, na2, eu, etc) so you need to re-configure once right after authentication.
Example:
The response to the Authentication: login API looks like:
{
"loginAccounts": [
{
"accountId": "123456",
"baseUrl": "https://na2.docusign.net/restapi/v2/accounts/123456",
"email": "jdoe#example.com",
"isDefault": "true",
"name": "LoanCo",
"siteDescription": "",
"userId": "abcdff66-f92e-4e8e-ab81-8c46f140",
"userName": "John Doe"
}
]
}
Then instantiate a new API client using the sub-domain that was returned in the login response:
ApiClient apiClient = new ApiClient("https://na2.docusign.net");