3290097 - Error "[LGN0015]Authentication failed. You have entered an incorrect username or password" - OData API

While calling SuccessFactors with OData API, are you facing the error below:

"API[LGN0015]Authentication failed. You have entered an incorrect username or password (status code = 4)."

SAP SuccessFactors HXM Suite

Perform an OData API call to SuccessFactors.

Wrong username and/or password;

1. Ensure the username really exists in the instance you are calling. Note that username is different than User ID or Person ID;
2. Ensure the SuccessFactors system password is really correct. If you are not sure about it, you can reset it in SuccessFactors under Reset User Passwords;
   NOTE: If using IAS/IPS, note the IAS/IPS password is completely different than the SuccessFactors system password;

OBS.: If using SSO without IAS/IPS, please, refer to the KBA 2505553 - Basic authentication is not working in a SSO enabled instance - SuccessFactors;

KBA 2505553 - Basic authentication is not working in a SSO enabled instance - SuccessFactors 

KBA 2791410 - Integrating SuccessFactors with Identity Authentication through the Upgrade Center 

api user, 401, unauthorized, authentication, credential, credentials, IAS, IPS , KBA , LOD-SF-INT-ODATA , OData API Framework , Problem