My network requires a username/e-mail along with the SSID and PSK, is it possible to configure this in octopi-wpa-supplicant.txt"?

What is the problem?

I want to configure a connection to my network, but along with the SSID and password, it also requires a username/e-mail. Is it possible to configure this in OctoPi, or is it strictly passwords only?

What did you already try to solve it?

Nope, because I don't know if I'll break anything.

Logs (octoprint.log, serial.log or output on terminal tab at a minimum, browser error console if UI issue ... no logs, no support!)

network={
ssid="Your Wifi SSID"
???="Your Wifi Username"
psk="supersecretwifipassword"
}

Additional information about your setup (OctoPrint version, OctoPi version, printer, firmware, browser, operating system, ... as much data as possible)

You could give this a try in your wpa_supplcant.conf file:

network={
        ssid="<network>"
        key_mgmt=WPA-EAP
        identity="<username>"
        password="<password>"
}

If you manually edit your /etc/wpa_supplicant/wpa_supplicant.conf file (and this is an OctoPi-imaged installation) then at the next boot the /boot/octopi-wpa-supplicant.txt file's content will update that.

Since the format of the OctoPi-named one in the boot partition is the same, try this tactic there instead.