If you want to change the password of your Rebrandly account follow this simple procedure:
1) Log in your Rebrandly account: https://oauth.rebrandly.com/account/login
2) Click on the avatar image (top right of your rebrandly dashboard)
3) Click on Account settings
4) Click on the "Change password" button
5) Fill the form to reset your password
In case you do not remember your Password and you need to reset it.
Then follow this procedure: https://support.rebrandly.com/hc/en-us/articles/229803207