modular: command not found

Basically,

curl https://get.modular.com | \ MODULAR_AUTH=mut_000000000000000000 \ sh -

curl https://get.modular.com | \ MODULAR_AUTH=mut_000000000000000000 \ sh -

doesn't seem to do anything.

modular install mojo

modular install mojo

gives me

modular: command not found

modular: command not found

modular: command not found - Modular