public Action:LoginStart(client, args)
{
  decl String:Login[MAX_NAME_LENGTH], String:password[PLATFORM_MAX_PATH];
   
  GetCmdArg(1, Login, MAX_NAME_LENGTH);
  GetCmdArg(2, password, PLATFORM_MAX_PATH);
   
  SHA1String(password, password);
   
  decl String:s_Query[MAX_NAME_LENGTH+PLATFORM_MAX_PATH+150];
  FormatEx(s_Query, sizeof(s_Query), "SELECT srv_group FROM %s_admins WHERE user='%s' AND password='%s' AND expired>'UNIX_TIMESTAMP()'", DatabasePrefix, Login, password);
  SQL_TQuery(Database, GetAdmin, s_Query, client, DBPrio_High);
      
         return Plugin_Handled;
}

public GetAdmin(Handle:h_Owner, Handle:h_Query, const String:s_Error[], any:i_Client)
{
      decl String:s_Grub[PLATFORM_MAX_PATH];
      if (h_Query != INVALID_HANDLE && SQL_GetRowCount(h_Query) > 0)
     {
         while (SQL_FetchRow(h_Query))
         {
             SQL_FetchString(h_Query, 1, s_Grub, sizeof(s_Grub));
         }
  CloseHandle(h_Query);
    
  new AdminId:id = CreateAdmin();
  //Тут выдать группу с названием из s_Grub
  SetUserAdmin(i_Client, id, true);
     }
     else
         PrintToChat(i_Client, "Query failed: %s", s_Error);
}