update code example

README.md

@@ -5,12 +5,21 @@ Rust wrapper around the Go `sbotcli` ScuttleButt tool ([cryptoscope/ssb](https:/
 ## Example
 
 ```rust
-let id = "@p13zSAiOpguI9nsawkGijsnMfWmFd5rlUNpzekEE+vI=.ed25519";
+use peach_sbotcli::{Sbot, SbotCliError};
 
-let follow_ref = peach_sbotcli::follow(id)?;
+fn example() -> Result<(), SbotCliError> {
-let block_ref = peach_sbotcli::block(id)?;
+    // uses default paths for `sbotcli` and `go-sbot` working directory
+    let sbot = Sbot::init(None, None)?;
 
-let invite_code = peach_sbotcli::create_invite()?;
+    let id = "@p13zSAiOpguI9nsawkGijsnMfWmFd5rlUNpzekEE+vI=.ed25519";
+
+    let follow_ref = sbot.follow(id)?;
+    let block_ref = sbot.block(id)?;
+
+    let invite_code = sbot.create_invite()?;
+
+    Ok(())
+}
 ```
 
 ## Documentation