Changes to Create User

added the optional property detail/items/ctx to the response with the 422 status

added the optional property detail/items/input to the response with the 422 status

response property created_at list-of-types was widened by adding types null to media type application/json of response 200

response property created_by list-of-types was widened by adding types null to media type application/json of response 200

header request parameter x-osmo-user list-of-types was widened by adding types null

for the header request parameter x-osmo-user, the type was generalized from string to no type

request property roles list-of-types was widened by adding types null to media type application/json

endpoint added