Created Creating a Client (markdown)

Creating-a-Client.md

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+The very first thing you want to do is to create a `TelegramClient`. This class will be your main interface with Telegram's API, and creating one is very simple:
+
+```python
+from telethon import TelegramClient
+
+# Use your own values here
+api_id = 12345
+api_hash = '0123456789abcdef0123456789abcdef'
+phone_number = '+34600000000'
+
+client = TelegramClient('some_name', api_id, api_hash)
+```
+
+Note that `'some_name'` will be used to save your session (persistent information such as access key and others) as `'some_name.session'` in your disk. This is simply a JSON file which you can (but shouldn't) modify.
+
+Before using the client, you must be connected to Telegram. Doing so is very easy:
+```python
+client.connect()  # Must return True, otherwise, try again
+```
+
+You may or may not be authorized yet. You must be authorized before you're able to send any request:
+```python
+client.is_user_authorized()  # Returns True if you can send requests
+```
+
+If you're not authorized, you need to `.sign_in()`:
+```python
+client.send_code_request(phone_number)
+myself = client.sign_in(phone_number, input('Enter code: '))
+# If .sign_in raises PhoneNumberUnoccupiedError, use .sign_up instead
+```
+
+`myself` is your Telegram user. You can view all the information about yourself by doing `print(myself.stringify())`. You're now ready to use the `client` as you wish!