auth fails with error from ldap3 module

[XenGi]

Getting an error when I try to use it:

$ hug -f dns_proxy/__init__.py
Traceback (most recent call last):
  File "/home/xengi/.pyvenvs//dns-proxy/bin/hug", line 33, in <module>
    sys.exit(load_entry_point('hug', 'console_scripts', 'hug')())
  File "/home/xengi/.pyvenvs/dns-proxy/lib/python3.8/site-packages/hug/interface.py", line 650, in __call__
    raise exception
  File "/home/xengi/.pyvenvs/dns-proxy/lib/python3.8/site-packages/hug/interface.py", line 646, in __call__
    result = self.output(self.interface(**pass_to_function), context)
  File "/home/xengi/.pyvenvs/dns-proxy/lib/python3.8/site-packages/hug/interface.py", line 129, in __call__
    return __hug_internal_self._function(*args, **kwargs)
  File "/home/xengi/.pyvenvs/dns-proxy/lib/python3.8/site-packages/hug/development_runner.py", line 65, in hug
    api_module = importlib.machinery.SourceFileLoader(file.split(".")[0], file).load_module()
  File "<frozen importlib._bootstrap_external>", line 462, in _check_name_wrapper
  File "<frozen importlib._bootstrap_external>", line 962, in load_module
  File "<frozen importlib._bootstrap_external>", line 787, in load_module
  File "<frozen importlib._bootstrap>", line 265, in _load_module_shim
  File "<frozen importlib._bootstrap>", line 702, in _load
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 783, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "dns_proxy/__init__.py", line 10, in <module>
    import hug_authentication_ldap
  File "/home/xengi/.pyvenvs/dns-proxy/lib/python3.8/site-packages/hug_authentication_ldap/__init__.py", line 23, in <module>
    from hug_authentication_ldap.authentication import server, verify, basic
  File "/home/xengi/.pyvenvs/dns-proxy/lib/python3.8/site-packages/hug_authentication_ldap/authentication.py", line 35, in <module>
    def verify(server_instance, user_template="uid={user_name},ou=people", authentication=ldap3.AUTH_SIMPLE, auto_bind=True,
AttributeError: module 'ldap3' has no attribute 'AUTH_SIMPLE'

Example code:

import hug
import hug_authentication_ldap

authentication = hug_authentication_ldap.basic('ldaps://myldapserver.com:7636', 'uid={user_name},cn=users,dc=my,dc=domain,dc=com')

@hug.post('/cname/{cname}', requires=authentication)
def update_cname(cname: fqdn_type, fqdns: fqdn_list_type, user: hug.directives.user):
    """Update CNAME with list of allowed FQDNs (old list will be replaced with the given one)"""
    print(user)