[Flutter] Trim String/Text in Flutter

Hi I tried to trim a link in flutter

Currently I am looking into regexp but I think that is not possible

This is the link in full:

http://sales.local/api/v1/payments/454/ticket/verify?token=jhvycygvjhbknm.eyJpc3MiOiJodH

What I am trying to do is to trim the link like this:

http://sales.local/api/v1/payments/454

Kindly advise on best practise to trim string/text in flutter. Thanks!

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