Tuya TYWE3S with firmware

I recently got my TYWE3S with firmware form tuya. Its basically a wall switch to control 4 gang relay.My issue is how to start the TYWE3S in paring mode to connect with app for testing as in diagram they also mentioned push button and at which gpio would it need to connect.
at rest it shows in serial
ets Jan 8 2013,rst cause:2, boot mode:(3,6)

load 0x40100000, len 2592, room 16
tail 0
chksum 0xf3
load 0x3ffe8000, len 764, room 8
tail 4
chksum 0x92
load 0x3ffe82fc, len 676, room 4
tail 0
chksum 0x22
csum 0x22

2nd boot version : 1.7(5d6f877)
SPI Speed : 40MHz
SPI Mode : QIO
SPI Flash Size & Map: 8Mbit(512KB+512KB)
jump to run user1 @ 1000

OS SDK ver: 2.0.0(898b733) compiled @ May 27 2019 18:49:04
phy ver: 1055_9, pp ver: 10.7

rf cal sector: 121
idle_task_hdl : 40107a70,prio:0, stack:384
tim_task_hdl : 40107bb8, prio:2,stack:512




That message is just the esp8266 reporting that it reset from the reset pin; it is not an error. Ask the manufacturer if their instructions are unclear.

it started pairing I pullup 1k resistor gpio0 led