"self signed certificate" error despite env. vars

[elig0n]

$ export SSL_CERT_FILE="" CURL_CA_BUNDLE="" REQUESTS_CA_BUNDLE="" ETESYNC_URL="https://192.168.14.64:3000" ;
$ etesync-dav manage add myuser
Please enter the EteSync account password: 
Logging in
Traceback (most recent call last):
  File "etesync-dav", line 84, in <module>
  File "etesync-dav", line 63, in manage
  File "etesync_dav/manage.py", line 164, in add_etebase
  File "etebase/__init__.py", line 91, in login
etebase_python.Error: error sending request for url (https://192.168.14.64:3000/api/v1/authentication/login_challenge/): error trying to connect: error:1416F086:SSL routines:tls_process_server_certificate:certificate ve
rify failed:ssl/statem/statem_clnt.c:1913: (self signed certificate)
[1863195] Failed to execute script 'etesync-dav' due to unhandled exception!

Using etesync-dav-bin 0.31.2-2 from AUR