parameters: (self, client_key, token, request)
docstring: Validates that supplied access token is registered and valid.
  
          :param client_key: The client/consumer key.
          :param token: The access token string.
          :param request: An oauthlib.common.Request object.
          :returns: True or False
  
          Note that if the dummy access token is supplied it should validate in
          the same or nearly the same amount of time as a valid one.
  
          Ensure latency inducing tasks are mimiced even for dummy clients.
          For example, use::
  
              from your_datastore import AccessToken
              try:
                  return AccessToken.exists(client_key, access_token)
              except DoesNotExist:
                  return False
  
          Rather than::
  
              from your_datastore import AccessToken
              if access_token == self.dummy_access_token:
                  return False
              else:
                  return AccessToken.exists(client_key, access_token)
  
          This method is used by
  
          * ResourceEndpoint
docstring_summary: Validates that supplied access token is registered and valid.
docstring_tokens: Validates that supplied access token is registered and valid .
function: def validate_access_token(self, client_key, token, request):
          """Validates that supplied access token is registered and valid.
  
          :param client_key: The client/consumer key.
          :param token: The access token string.
          :param request: An oauthlib.common.Request object.
          :returns: True or False
  
          Note that if the dummy access token is supplied it should validate in
          the same or nearly the same amount of time as a valid one.
  
          Ensure latency inducing tasks are mimiced even for dummy clients.
          For example, use::
  
              from your_datastore import AccessToken
              try:
                  return AccessToken.exists(client_key, access_token)
              except DoesNotExist:
                  return False
  
          Rather than::
  
              from your_datastore import AccessToken
              if access_token == self.dummy_access_token:
                  return False
              else:
                  return AccessToken.exists(client_key, access_token)
  
          This method is used by
  
          * ResourceEndpoint
          """
          raise self._subclass_must_implement("validate_access_token")
function_tokens: def validate_access_token ( self , client_key , token , request ) : raise self . _subclass_must_implement ( "validate_access_token" )