Login failed for user '##S3_LOGIN_ADMIN##SAGE300VAULT

Hi ,

Sage 300 7.2 , we have a 3rd party application that build to connect through API. When we tested the apps it is unable to connect to Sage 300 Session . If we check to Event Viewer we found this error 

Login failed for user '##S3_LOGIN_ADMIN##SAGE300VAULT'. Reason: Password did not match that for the login provided. [CLIENT: <local machine>]

Sage 300 is working fine no issue, only this 3rd party apps is unable to connect. Please advise. 

Thanks