Readme fix

Author: Badiboy

README.md

@@ -17,7 +17,7 @@ Everything is as simple as the [API](https://help.crypt.bot/crypto-pay-api#avail
 2. Access API methods in pythonic notation (getInvoices -> get_invoices)
 ```
 from pyCryptoPayAPI import pyCryptoPayAPI
-client = pyCryptoPayAPI(api_token="zzz")
+client = pyCryptoPayAPI("API_TOKEN")
 print(client.get_balance())
 ```
 You can also check tests.py.

pyCryptoPayAPI/tests.py

@@ -25,7 +25,7 @@ def run_and_print(f):
     return None
 
 def run_api_functions(result_as_class):
-    client = pyCryptoPayAPI(api_token=test_api_token, print_errors=True, result_as_class=result_as_class)
+    client = pyCryptoPayAPI(test_api_token, print_errors=True, result_as_class=result_as_class)
     run_and_print(lambda: client.get_me())
     run_and_print(lambda: client.get_balance())
     run_and_print(lambda: client.get_exchange_rates())