This is the link to create the poster collaboratively:

https://www.canva.com/design/DAD1P1iVkCA/share/preview?token=q2fUf7blB2O0qdnm1BacpQ&role=EDITOR&utm_content=DAD1P1iVkCA&utm_campaign=designshare&utm_medium=link&utm_source=sharebutton

And this is the result: