can`t remember password for ip ptz cam

[prop]

i have 3 hilook mini ptz cameras that i am trying to get online. i am using ivms 4200 and one camera has been online for over a year at it`s current location , so no problem with that one. i have 2 other identical camera s that i had at another location and now i`m trying to get them online at my current location. the problem is i can`t remember the passwords for the cameras to add them or unbind them. any suggestions? thanks