Add credentials to parameters

- Adding the credentials via dsn causes problems when the password contains an @ symbol

src/Jenssegers/Mongodb/Connection.php

@@ -136,6 +136,9 @@ class Connection extends \Illuminate\Database\Connection
             $driverOptions = $config['driver_options'];
         }
 
+        $options['username'] = $config['username'];
+        $options['password'] = $config['password'];
+
         return new Client($dsn, $options, $driverOptions);
     }
 
@@ -175,20 +178,7 @@ class Connection extends \Illuminate\Database\Connection
             }
         }
 
-        // The database name needs to be in the connection string, otherwise it will
-        // authenticate to the admin database, which may result in permission errors.
-        $auth = '';
-        if (! empty($username)) {
-            $auth .= $username;
-        }
-        if (! empty($password)) {
-            $auth .= ':' . urlencode($password);
-        }
-        if ($auth) {
-            $auth .= '@';
-        }
-
-        return "mongodb://" . $auth . implode(',', $hosts) . "/{$database}";
+        return "mongodb://" . implode(',', $hosts) . "/{$database}";
     }
 
     /**