For SCIM setup (and general when talking to our API) you need a base64 encoded version of the <username>:<password>.
When creating an API user I would like to copy base64 encoded <username>:<password> directly from the screen that shows the user credentials. That way I do not have to do the base64 encoding manually. (Instead of doing 5+ steps: https://stackoverflow.com/questions/37046771/base64-encode-string-command-line-windows).