add docs

Author: hantmac

docs/connection.md

@@ -15,20 +15,22 @@ client = Client(
     database="default",
     user="user",
     port="443",
+    secure=True,
     password="password", settings={"copy_purge": True, "force": True})
 ```
 
 ### Parameter References
 
-| Parameter        | Description                                                                                              | Default     | example                                        |
-|------------------|----------------------------------------------------------------------------------------------------------|-------------|------------------------------------------------|
-| user             | username                                                                                                 | root        |                                                | 
-| password         | password                                                                                                 | None        |                                                |                  | 
-| port             | server port                                                                                              | None        |                                                |
-| database         | selected database                                                                                        | default     |     
-| secure           | Enable SSL                                                                                               | false       | http://root@localhost:8000/db?secure=False     |
-| copy_purge       | If True, the command will purge the files in the stage after they are loaded successfully into the table | false       | http://root@localhost:8000/db?copy_purge=False |
-| debug            | Enable debug log                                                                                         | False       | http://root@localhost:8000/db?debug=True       |
-| persist_cookies  | if using cookies set by server to perform following requests.                                            | False       | http://root@localhost:8000/db?persist_cookies=True|
-| null_to_none     | if the result data NULL which is of type str, change it to NoneType                                      | False       | http://root@localhost:8000/db?null_to_none=True|
+| Parameter         | Description                                                                                              | Default | example                                                   |
+|-------------------|----------------------------------------------------------------------------------------------------------|---------|-----------------------------------------------------------|
+| user              | username                                                                                                 | root    |                                                           | 
+| password          | password                                                                                                 | None    |                                                           |                  | 
+| port              | server port                                                                                              | None    |                                                           |
+| database          | selected database                                                                                        | default |     
+| secure            | Enable SSL                                                                                               | false   | http://root@localhost:8000/db?secure=False                |
+| copy_purge        | If True, the command will purge the files in the stage after they are loaded successfully into the table | false   | http://root@localhost:8000/db?copy_purge=False            |
+| debug             | Enable debug log                                                                                         | False   | http://root@localhost:8000/db?debug=True                  |
+| persist_cookies   | if using cookies set by server to perform following requests.                                            | False   | http://root@localhost:8000/db?persist_cookies=True        |
+| null_to_none      | if the result data NULL which is of type str, change it to NoneType                                      | False   | http://root@localhost:8000/db?null_to_none=True           |
+| connect_timeout   | timeout seconds when connect to databend                                                                 | 20      | http://root:root@localhost:8000/db?connect_timeout=30     |