/meta/createAttributeDefinitions

Creates a new data field (custom user attribute) where information about users can be stored. With the standard setup, you are permitted to create a limited number of custom attributes with different data types.
Each custom user attribute has a unique name. If an attribute is no longer needed, it may be archived. Please contact your customer support representative if you need to delete an attribute.
Request body example:

[{
"name": "attributename",
"type": "STRING",
"enumerationValues":
[
"value1",
"value2",
"value3"
],
"active": "true"
}]