Merge pull request #167 from AzureAD/minor_spell_error

Minor change

Author: abhidnya13

msal/application.py

@@ -713,7 +713,7 @@ def acquire_token_by_device_flow(self, flow, **kwargs):
 
     def acquire_token_by_username_password(
             self, username, password, scopes, **kwargs):
-        """Gets a token for a given resource via user credentails.
+        """Gets a token for a given resource via user credentials.
 
         See this page for constraints of Username Password Flow.
         https://github.com/AzureAD/microsoft-authentication-library-for-python/wiki/Username-Password-Authentication