Finish database code

src/database/database.rs

@@ -4,7 +4,7 @@ use dotenv::dotenv;
 use std::env;
 
 pub fn connect() -> PgConnection{
-    dotenv.ok();
+    dotenv().ok();
 
     let database_url = env::var("DATABASE_URL").expect("DATABASE_URL must be set!");
     PgConnection::establish(&database_url).expect(&format!("Error connecting to {}", database_url))