Attribute Map: Use this JSON input to build internal attributes (key) from external attributes (value). External attribute names enclosed with '%' will be interpolated in value strings.
Example, {"email":"%email%", "name":"%firstname%, %lastname%"}
The attribute map is always interpolated. In CAS 1.0 only the username
attribute is available. Available internal attributes are: username, name, email, rooms; rooms is a comma-separated list of rooms to join upon user creation e.g: {"rooms": "%team%,%department%"} would join CAS users on creation to their team and department channel.