break fluid is leaking

[KiaDxb]

i've got my breaks changed and the break fluid is leaking but i cant find where its leaking from

whiting 5 min after a top up the fluid vanishes

please tell me the possible places it must be leaking from

thanks

[KiaDxb]

Check the place where you install the brake pad, it has cylinder having hose at back for aplying pressure on brake with brake oil to push the pistons that push the caliper. Check those hose.