Type Default Option: -user
string x3270 c3270 wc3270 s3270 b3270

Specifies the response to a TELNET NEW-ENVIRON sub-negotiation request, when the host requests the USER system variable.

If the user resource is not set, the response will be the value of the USER environment variable, if defined, otherwise the value of the USERNAME environment variable, if defined. If the user resource is not set, and neither USER nor USERNAME is defined in the environment, the emulator will return the string UNKNOWN to the host.

To force the emulator to return an empty string in response to a USER system variable request, set the user resource to an empty string, or set the USER environment variable to an empty string. There is currently no way to force the emulator to tell the host that the USER system variable does not have a value.