Access to Airtable interfaces requires creating an Airtable account & logging in with that Airtable account.
Additionally, if you give those accounts more than read-only access, you will be paying for those accounts.
To workaround this limitation, you could pay for an external interface tool (also known as a “customer portal”). A few of the leading customer portals are Noloco, JetAdmin, Softr, Pory, and Glide.
JetAdmin is probably my favorite for sheer simplicity & user-friendliness, while Noloco is probably the most powerful & customizable one for complex needs.
I give a brief tutorial of Noloco on this Airtable podcast episode. And I also presented a full one-hour webinar on Noloco called Building a Client Portal on Noloco powered by Airtable.
p.s. If you have a budget for your project and you’d like to hire an expert Airtable consultant to help you with any of this, please feel free to contact me through my website: Airtable consulting — ScottWorld