How can I unlock my watch off activation lock if I don’t remember the last password I used

Which method did you try?:

1. How to reset your Apple Watch if you forgot your passcode
2. How to reset your Apple Watch using your paired iPhone

What is the exact wording of where you were advised to use the "password" you used "at the time of setup?"

Since you mention "password," which is used for your Apple ID, it may be helpful to review About Activation Lock on your Apple Watch.

Please refer to If you forgot your Apple Watch passcode.

sheronica80 wrote:

That didn’t work it wants the password I used at the time of setup

Also refer to how to unpair iwatch when passcode has be… - Apple Community