User custom attributes are user-specific values for a particular custom attribute. For example
If we see the custom attribute Pay Band, we can see that the user custom attribute values for Adam, Betty, and Carl are L1, L1, and L2 respectively.
Before populating user custom attributes for particular users, you must create the custom attributes themselves. See Custom Attributes for more information about working with custom attributes.
Note that Degreed treats user custom attribute values as a single, whole list. Therefore, after you have used POST /user-custom-attributes to create user custom attribute values for a particular user, you cannot use POST again, but rather must PATCH to replace the existing list of attributes with a new list of attributes.