Using a Yubikey with Tranquil SSO

Sign into your SSO account here

Once you have signed in Click on Signing In,  under the Account Security Heading

From the next menu that appears choose Set Up Passkey under Passwordless heading

On the next screen click Register

If you get a 1Password popup menu like the below 

Click This Icon 

The below screen will appear. Select Save another way

Select Use a different phone, tablet or security key

Now insert your Yubikey and press the button once. 

You will be prompted to press the button a second time. Now your key has been added and should work successfully for all future logins.