fixing linting errors

Backend/postgres_connector.py

@@ -6,7 +6,6 @@
 import psycopg2.extras
 from config import load_config
 
-
 # important do not store password when dealing with real database
 # might want to consider SQL injection down the line
 # gets all systems from the database
@@ -20,13 +19,15 @@ class PostgresConnector:
         connection: A psycopg2 connection object to interact with the database.
     """
     def __init__(self):
-        self.connection = psycopg2.connect(
-                        host='localhost',
-                        dbname='dad',
-                        user='dad_user',
-                        password='dad_pass',
-                        port='5432'
-                    )
+        config = load_config()
+        try:
+            # connecting to the PostgreSQL server
+            self.connection = psycopg2.connect(**config)
+            print('Connected to the PostgreSQL server.')
+
+        except (psycopg2.DatabaseError, Exception) as error:
+            print(error)
+
 
     def construct_label(self, data):
         return (