3631957 - Authentication Error After IPS Provisioning to SAP HANA Cloud

After configuring Identity Provisioning Service (IPS) for user provisioning to SAP HANA Cloud, you encounter the following error during authentication. The error is found by querying the correlation ID in your SAP HANA Cloud database:

SELECT * FROM SYS.AUTHENTICATION_ERROR_DETAILS WHERE CORRELATION_ID = '<CORRELATION-ID>';

Error message:
Getting user claim "user_name" failed: Claim "user_name" not found in payload

Transformation mapping has been changed for attribute from: 

            {
                "sourcePath": "$.userName",
                "targetPath": "$.userName"
            },

to:

            {
                "sourcePath": "$.userName",
                "targetPath": "$.user_name"
            }

SAP HANA Cloud

IPS, SAP HANA Cloud, Identity Provider, user_name, claim not found, authentication error, JWT, SAML, provisioning , KBA , HAN-CLS-HC , HANA Cloud Services HANA Cloud , Problem