parameters: (self, client_id, user_agent, scope)
return_statement: return self._data.get(key, None)
docstring: Get a credential from the multistore.
  
      The multistore must be locked.
  
      Args:
        client_id: The client_id for the credential
        user_agent: The user agent for the credential
        scope: A string for the scope(s) being requested
  
      Returns:
        The credential specified or None if not present
docstring_summary: Get a credential from the multistore.
docstring_tokens: Get a credential from the multistore .
function: def _get_credential(self, client_id, user_agent, scope):
      """Get a credential from the multistore.
  
      The multistore must be locked.
  
      Args:
        client_id: The client_id for the credential
        user_agent: The user agent for the credential
        scope: A string for the scope(s) being requested
  
      Returns:
        The credential specified or None if not present
      """
      key = (client_id, user_agent, scope)
  
      return self._data.get(key, None)
function_tokens: def _get_credential ( self , client_id , user_agent , scope ) : key = ( client_id , user_agent , scope ) return self . _data . get ( key , None )