Fetch a user dictionary from an email.

Arguments:

def api.users.from_email(
  email: str = None,
  include_unverified: bool = True,
):

Returns a dict in the form:

{
  'user_id': str,
  'email': str, # Primary user email
  'display_name': str,
}

Example:

user = api.users.from_email(email="foo@bar.com")