OpenVPN client with tls-auth in RouterOS 6.27?

Hi,

I need to connect from RouterOS 6.27 with OpenVPN to a linux server that requires tls-auth.
is this possible?
When connecting from a linux box the “tls-auth ta.key 1” openvpn config is required.

I don’t see how I can upload the ta.key file.
I have uploaded and imported ca.crt and user crt and key, but it refuses to import ta.key.

Is TLS even supported in the client?
If not, when will it be?

Thank you.
TS

tls-auth is not supported by MikroTik.