code: def get(self, block_id):
          
  
          pool = current_app.config['bigchain_pool']
  
          with pool() as bigchain:
              block = bigchain.get_block(block_id=block_id)
  
          if not block:
              return make_error(404)
  
          return block
docs: API endpoint to get details about a block.
  
          Args:
              block_id (str): the id of the block.
  
          Return:
              A JSON string containing the data about the block.