"adl_accounts.head" could list account but the structure is wield

[jingyanjingyan]

Describe the bug
"adl_accounts.head" could list account but the structure is wield

To Reproduce
Steps to reproduce the behavior:

1. %reload_ext adlmagics
2. %adl login --tenant microsoft.onmicrosoft.com
3. %adl listaccounts --page_index 0 --page_account_number 30
4. adl_accounts.head

Expected behavior
Not sure, list account with clear UI or give out warning like "please use .head()"
And use the UI as samples

Screenshots

Desktop (please complete the following information):
OS: Win10
Browser: chrome
Jupyter Version: Python 3.6.2, Jupyter 4.4.0

Additional context
Add any other context about the problem here.

[ruixinxu]

not sure is xx.head a valid function in pandas?