incorrect error message for active_roles.add[][a]=b

[ElectricNroff]

https://cveawg.mitre.org/api-docs/#/Users/userUpdateSingle says

PUT /org/{shortname}/user/{username}
...
active_roles.add
string
(query)

However, a user can try to specify an array of objects instead of a string, i.e.,

curl -g -X PUT \
-H "CVE-API-ORG: ..." \
-H "CVE-API-USER: ..." \
-H "CVE-API-KEY: ..." \
'https://cveawg-test.mitre.org/api/org/Mickey%20Mouse/user/minnie?active_roles.add[][a]=b'

This results in:

{"error":"BAD_INPUT","message":"Parameters were invalid","details":[{"msg":"Parameter must be a one-dimensional array of strings","param":"active_roles.add","location":"query"}]}

The must in the above error message is incorrect because the API specification states that active_roles.add is supposed to have a string value, and the implementation does support a string. (The implementation happens to support either the string "ADMIN" or an array in which each array element is the string "ADMIN" - for small numbers of array elements.)