Don't make use of hardcoded default string values

pyrogram/client/client.py

@@ -160,8 +160,8 @@ class Client(Methods, BaseClient):
                  first_name: str = None,
                  last_name: str = None,
                  workers: int = 4,
-                 workdir: str = ".",
-                 config_file: str = "./config.ini"):
+                 workdir: str = BaseClient.WORKDIR,
+                 config_file: str = BaseClient.CONFIG_FILE):
         super().__init__()
 
         self.session_name = session_name

pyrogram/client/ext/base_client.py

@@ -49,6 +49,8 @@ class BaseClient:
     UPDATES_WORKERS = 1
     DOWNLOAD_WORKERS = 1
     OFFLINE_SLEEP = 300
+    WORKDIR = "."
+    CONFIG_FILE = "./config.ini"
 
     MEDIA_TYPE_ID = {
         0: "thumbnail",