code: def aes_decrypt(value, secret, block_size=AES.block_size):
      
      if value is not None:
          cipher = AES.new(secret[:32], AES.MODE_CFB, value[:block_size])
          return cipher.decrypt(uniorbytes(value[block_size * 2:], bytes))
docs: AES decrypt @value with @secret using the |CFB| mode of AES
          with a cryptographically secure initialization vector.
  
          -> (#str) AES decrypted @value
  
          ..
              from vital.security import aes_encrypt, aes_decrypt
              aes_encrypt("Hello, world",
                          "aLWEFlwgwlreWELFNWEFWLEgwklgbweLKWEBGW")
              # -> 'zYgVYMbeOuiHR50aMFinY9JsfyMQCvpzI+LNqNcmZhw='
              aes_decrypt(
                  "zYgVYMbeOuiHR50aMFinY9JsfyMQCvpzI+LNqNcmZhw=",
                  "aLWEFlwgwlreWELFNWEFWLEgwklgbweLKWEBGW")
              # -> 'Hello, world'
          ..