Remove duplicated bind code (#104)

Author: nE0sIghT

ldap_auth_provider.py

@@ -475,33 +475,13 @@ async def _ldap_authenticated_search(self, server, password, filters):
         """
 
         try:
-            conn = await threads.deferToThread(
-                ldap3.Connection,
-                server,
-                self.ldap_bind_dn,
-                self.ldap_bind_password,
-                raise_exceptions=True,
-            )
-            logger.debug(
-                "Established LDAP connection in search mode: %s",
-                conn
+            result, conn = await self._ldap_simple_bind(
+                server=server,
+                bind_dn=self.ldap_bind_dn,
+                password=self.ldap_bind_password,
             )
 
-            if self.ldap_start_tls:
-                await threads.deferToThread(conn.open)
-                await threads.deferToThread(conn.start_tls)
-                logger.debug(
-                    "Upgraded LDAP connection in search mode through "
-                    "StartTLS: %s",
-                    conn
-                )
-
-            if not await threads.deferToThread(conn.bind):
-                logger.warning(
-                    "Binding against LDAP with `bind_dn` failed: %s",
-                    conn.result['description']
-                )
-                await threads.deferToThread(conn.unbind)
+            if not result:
                 return (False, None, None)
 
             # Construct search filter