Hi! Not sure where to ask this, so I apologize in advance if this is the wrong place 😅 I wanted to invite a couple more friends of mine who are interested in open source hardware, and I sent them the invite link: https://join.skywater.tools/ However, it seems that they can't sign up and join this Slack because there is a restriction to @efabless.com and @pragmaticsemi.com - we do not have that. Could someone guide me as to how I can invite them as well. Thank you!