changes Nachname to sec_name

rep_cli.py

@@ -13,7 +13,7 @@ class Session:
 
     def get_active_user(self):
         sql_command = f'''
-                      SELECT first_name, Nachname
+                      SELECT first_name, sec_name
                       FROM pianist
                       WHERE id = {self.user}
                       '''
@@ -46,7 +46,7 @@ class Session:
     
     def create_new_user(self, first_name, name):
         sql_command = f'''
-                      INSERT INTO pianist (first_name, Nachname)
+                      INSERT INTO pianist (first_name, sec_name)
                       VALUES ("{first_name}", "{name}");
                       '''
         self.db_agent.execute(sql_command)