Using DFF as query parameter for userAccounts REST API GET call?

Hello,

Is it possible to use a DFF as a query parameter for the GET userAccounts REST API call for Fusion HCM?

We currently are using ****_ATTRIBUTE_1 in PER_ALL_ASSIGNMENTS_M at the assignment level in HCM to store an ID. Is it possible to USE this DFF (****_ATTRIBUTE_1) as a query parameter to return users?

For example, a GET on the following endpoint using the seeded Username field is successful:

/hcmRestApi/resources/11.13.18.05/userAccounts?q=Username={insert_test_username_here}

However, we are wondering if we can similarly use a query parameter to search by DFF instead of seeded field.