<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _bind(self):
 """bind to the ldap with the technical account"""

        ldap_client = self._connect()
        try:
            ldap_client.simple_bind_s(self.binddn, self.bindpassword)
        except Exception as e:
            ldap_client.unbind_s()
            self._exception_handler(e)
        return ldap_client