'Let SSL know where we can find trusted certificates for the certificate
chain
:param cafile: In which file we can find the certificates (``bytes`` or
``unicode``).
:param capath: In which directory we can find the certificates
(``bytes`` or ``unicode``).
:return: None'

def load_verify_locations(self, cafile, capath=None):

    if (cafile is None):
        cafile = _ffi.NULL
    else:
        cafile = _path_string(cafile)
    if (capath is None):
        capath = _ffi.NULL
    else:
        capath = _path_string(capath)
    load_result = _lib.SSL_CTX_load_verify_locations(self._context, cafile, capath)
    if (not load_result):
        _raise_current_error()
