Changed database_name setter error.

Removed unnecessary import and shifted some of the spacing around as well.

EasyGA/database/sql_database.py

@@ -1,12 +1,12 @@
 import sqlite3
-from typing import get_type_hints
+
 from tabulate import tabulate
 
+
 class SQL_Database:
     """Main database class that controls all the functionality for input /
     out of the database using SQLite3."""
 
-
     def __init__(self):
         self.conn = None
         self.config_id = None
@@ -311,7 +311,7 @@ class SQL_Database:
 
     @database_name.setter
     def database_name(self, value_input):
-        raise Exception("Invalid usage, please use ga.database_name instead.")
+        raise AttributeError("Invalid usage, please use ga.database_name instead.")
 
 
     @property