I use ISE 2.4.0 Tacacs+ service for authentication of Prime 3.4.0 users.
We also use same ISE 2.4.0 TACACS+ service for network device management.
Initially when I added network devices in Prime inventory I've used my tacacs+ credentials.
After That whenever different user is making configuration changes from prime it uses my credentials.
How To make prime to authenticate with tacacs+ on network device with specific administrator credentials.