Navigation
You can find this page by navigating to My Accounts then on the dashboard clicking on User Preferences, and then you are presented with the landing page, My User Profile.
My Accounts → User Preferences → My User Profile
How does it work?
The set of fields on the left of the page allows you to change your user email (this email is required for logging in and used to receive emails regarding payments and more), user name, and contact number. The set of fields on the right of the page is entirely dedicated to changing your password - this being the password you use to log in to your Blink portal.