code: function getPeerByRTCId(id)
      {
          for(var num = 0; num < scope._servConn.roomUsers.length; num++)
          {
              if(scope._servConn.roomUsers[num].rtcId == id)
              {
                  return scope._servConn.roomUsers[num];
              }
          }
          return null;
      }
docs: gets ConnectaPeer instance by rtcId