VERIFIED SOLUTION i

Where are user credentials stored accessing a secure service in MapInfo Pro

Product affected: MapInfo Pro
 
When accessing  a secure service in MapInfo Pro™ such as WMS, WFS, WMTS the user is asked for this credentials. 
They're stored in the Windows credential cache. The Windows Credential Manager in the control panel can be used if they need to get removed or edited.
UPDATED:  April 25, 2019