@AgustinaCA, that helps. It's definitely "Sign in" that you want to use. I did find this:
"How do I stream Paramount+ with my Walmart+ membership?
It’s easy! Once you’ve linked your Walmart+ and Paramount+ accounts, you can visit paramountplus.com or the Paramount+ app from any supported device and begin streaming."
https://help.paramountplus.com/s/article/PD-Is-Paramount-available-with-a-Walmart-membership#howto
I think @makaiguy 's post above gives the proper steps to take for this linking of accounts. If you've already tried those steps, I think Walmart or Paramount+ would be better places for help.
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