"client_account_code"
"did_number": ["1234567890"] or ["1234567890","1234567891","1234567892"]

curl -X POST \
-H "Authorization: Token d37fa8c4e008fec158070b1b4aea5f0db3d6a06e" \
-H "Content-Type: application/json" \
-d '{"did_number":["1234567890"], client_account_code":"2144533795"}' \
-k https://your.domain.com/api/users/did_assign

{"status": "success"}