diff --git a/src/main.rs b/src/main.rs
index fc26503..96fd338 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -13,8 +13,8 @@ async fn main() {
     client_options.app_name = Some("My App".to_string());
 
     let credential_builder = Credential::builder()
-                            .username(Some(std::env::var("mongo_username").unwrap()))
-                            .password(Some(std::env::var("mongo_password").unwrap()));
+                            .username(String::from(env!("mongo_username")))
+                            .password(String::from(env!("mongo_password")));
 
     client_options.credential = Some(credential_builder.build());