OpenVPN - No request of OTP-Token

Hi,
I want to make a Roadwarrior with ‘FreeOTP’ On the IPFire side, I activate the OTP checkbox.
On the Client side I use Linux Mint 20.3
I import the *.ovpn file the add the connection.
When I start the connection I’ve got no question about the OTP-Token. Why the OTP-Token is not requested?

This is my ovpn-file:

#OpenVPN Client conf
tls-client
client
nobind
dev tun
proto udp
tun-mtu 1400
remote mywebspace.de 1194
pkcs12 OpenVPN.p12
cipher AES-256-CBC
auth SHA512
tls-auth ta.key
verb 3
remote-cert-tls server
verify-x509-name mywebspace.de name
mssfix 0
auth-nocache
auth-token-user USER
auth-token TOTP
auth-retry interact

look here

Thank for your answer! I’ve set the lines in the following position, but the OTP Windows did’t appear:

This is my ovpn-file:

#OpenVPN Client conf
tls-client
reneg-sec 28800
client
nobind
dev tun
proto udp
tun-mtu 1400
remote mywebspace.de 1194
pkcs12 OpenVPN.p12
cipher AES-256-CBC
auth SHA512
tls-auth ta.key
verb 3
remote-cert-tls server
verify-x509-name mywebspace.de name
mssfix 0
auth-nocache
auth-token-user USER
auth-token TOTP
auth-retry interact

#auth-user-pass
static-challenge “Enter your OTP” 0
providers legacy default

Remove “#” from #auth-user-pass line. It marks this line comment.
I dont know if all this settings are work with the linux client. I use it only on Windows with the OpenVPN Community Client.