Function try_build_client 

pub fn try_build_client<F>(configure: F) -> Result<Client, Error>
where
    F: Fn(ClientBuilder) -> ClientBuilder,

Try to build an HTTP client, returning an error if both primary and fallback builders fail.

This is the fallible version of build_client. Use this when you want to handle the error gracefully (e.g., return an error to the caller) instead of panicking.