ed25519_dalek No generate function

[programskillforverification]

I am trying to run code provided in document.

The compiler tell me:

let signing_key: SigningKey = SigningKey::generate(&mut csprng); | ^^^^^^^^ function or associated item not found in SigningKey

This is my dependencies [dependencies] ed25519-dalek = "2.1.0" rand = "0.8.5"

[robjtede]

As documented, a crate feature is required:

ed25519-dalek = { version = "...", features = ["rand_core"] } 

[programskillforverification]

As documented, a crate feature is required:

ed25519-dalek = { version = "...", features = ["rand_core"] } 

Thanks a lot!