Updated API documentation; Fixing #29 (#40)

Author: hiranya911

firebase_admin/auth.py

@@ -91,9 +91,8 @@ def verify_id_token(id_token, app=None):
  dict: A dictionary of key-value pairs parsed from the decoded JWT.
 
  Raises:
- ValueError: If the input parameters are invalid, or if the App was not
+ ValueError: If the JWT was found to be invalid, or if the App was not
  initialized with a credentials.Certificate.
- AppIdenityError: The JWT was found to be invalid, the message will contain details.
  """
  token_generator = _get_token_generator(app)
  return token_generator.verify_id_token(id_token)
@@ -192,8 +191,8 @@ def verify_id_token(self, id_token):
  dict: A dictionary of key-value pairs parsed from the decoded JWT.
 
  Raises:
- ValueError: The app was not initialized with a credentials.Certificate instance.
- AppIdenityError: The JWT was found to be invalid, the message will contain details.
+ ValueError: The JWT was found to be invalid, or the app was not initialized with a
+  credentials.Certificate instance.
  """
  if not id_token:
  raise ValueError('Illegal ID token provided: {0}. ID token must be a non-empty '