Fix dns TXT

src/did.rs

···
     if did_res.len() != 1 {
         return Err(());
     }
-    let did = did_res[0].clone();
 
-    return Ok(did.clone());
+    return Ok(did_res[0][4..].to_string());
 }
 
 fn get_http_did(handle: &String) -> Result<String, ()> {