Exit when unknown argument is passed

src/functions.rs

@@ -165,6 +165,7 @@ pub fn process_args(mut args: Vec<String>) -> (Vec<String>, HashMap<&'static str
             other => {
                 if other.starts_with("-") {
                     eprintln!("Unknown argument passed: {}", other);
+                    exit(1);
                 } else {
                     entries.push(arg);
                 }

src/main.rs

@@ -27,7 +27,7 @@ fn main() {
 
     if api_key == "" {
         eprintln!("Error reading the config file. Pass --help to see help.");
-        exit(1);
+        exit(2);
     }
 
     // Create TMDb object for API calls