User will be entering their topmate profile in the beacons text input as
`https://topmate.io/<username>`

we need to extract the username field , the embeddable url will look like
`https://topmate.io/beacons/<username>`

For example, if someone enters their topmate profile url as
https://topmate.io/dinesh

then the embeddable url for beacons becomes
https://topmate.io/beacons/dinesh