improved main.rs error handling

src/main.rs

@@ -1,12 +1,12 @@
 mod observations;
 
 use std::env::var;
+use std::error::Error;
 
 #[tokio::main]
-async fn main() {
-    observations::get_observations()
-        .await
-        .expect("The get observations function didn't seem to work");
+async fn main() -> Result<(), Box<dyn Error>> {
+    observations::get_observations().await?;
+    Ok(())
 }
 
 // This function has been left in main.rs as this will also be used by a future forecasts.rs module
@@ -18,16 +18,12 @@ fn get_config_path() -> String {
     // We need to clean the start and end of this string
     println!("short path {:?}", home_dir);
     // We need to convert the type to String
-    let hd_string = format!(
-        "{:?}",home_dir 
-    );
+    let hd_string = format!("{:?}", home_dir);
     let start = 5; // This is to remove formatting from start of file path
-    let length = hd_string.len(); 
-    let end = length-2; // This is to remove same from end
+    let length = hd_string.len();
+    let end = length - 2; // This is to remove same from end
     let clean_dir = &hd_string[start..end];
     // Now that we have a clean string we can amend the rest
-    let config_path = format!(
-        "/{}/.config/rusqttbom/config.toml", clean_dir 
-    );
+    let config_path = format!("/{}/.config/rusqttbom/config.toml", clean_dir);
     config_path
-}
+}