You can either use the session-wide link, persistent links, or single-use links.

Session-wide link

If it is impractical to distribute distinct URLs to each participant, you can give the following start URL to all 10 participants.

https://floating-sierra-61355.herokuapp.com/join/k1v90aozhz/

Note: unlike the other link modes, this does not prevent the same person from playing twice.

Persistent links

If you want to give your participants permanent links that don't change, you should create your session in a room.

Single-use links

Below are single-use links, which you can distribute to your participants. Each link has a unique code for the participant.

P1	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/xyukgdw5
P2	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/h1i802pb
P3	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/5xw0iums
P4	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/l3sm0m8v
P5	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/0987nh39
P6	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/wokh5sce
P7	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/wotnc55h
P8	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/mipjuxll
P9	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/rbsomipo
P10	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/x7aotugc