title: Is it possible for flutter to get the browser url when a url is launched in an in-app-browser?
body: <p>I am trying to connect the FitbitAPI to my flutter-firebase application. However, whenever I authenticate my account it doesn't redirect back to my application. I used the Implicit Grant Flow since I am not working with a server to power my backend. However, I do not have a way to get the token written in the browser url. An example of this is : </p>
  
  <blockquote>
    <p><a href="https://MYFIREBASEPROJECT.firebaseapp.com/__/auth/handler#access_token=eyJhbGciOiJIUzI1NiJ9.egfhwerqwjehqwkjehkashdaadadsadybG9jIHJ3ZW123123123sdsadsaasdasdagcnBybyByc2xlIiwiZXhwIjoxNTczMjk5ODQ2LCJpYXQiOjE1NzI2OTUwNDZ9.axlEiYsVicy6l-aEbphcqZlr3bHXUxq6hV2ky5o_3qw&amp;user_id=7SFL86&amp;scope=social+location+weight+nutrition+activity+sleep+settings+heartrate+profile&amp;token_type=Bearer&amp;expires_in=604800" rel="nofollow noreferrer">https://MYFIREBASEPROJECT.firebaseapp.com/__/auth/handler#access_token=eyJhbGciOiJIUzI1NiJ9.egfhwerqwjehqwkjehkashdaadadsadybG9jIHJ3ZW123123123sdsadsaasdasdagcnBybyByc2xlIiwiZXhwIjoxNTczMjk5ODQ2LCJpYXQiOjE1NzI2OTUwNDZ9.axlEiYsVicy6l-aEbphcqZlr3bHXUxq6hV2ky5o_3qw&amp;user_id=7SFL86&amp;scope=social+location+weight+nutrition+activity+sleep+settings+heartrate+profile&amp;token_type=Bearer&amp;expires_in=604800</a></p>
  </blockquote>
  
  <p>I would like a way for me to get the last url from an in-app web browser. The in-app-browser package I use is <a href="https://pub.dev/packages/flutter_web_browser" rel="nofollow noreferrer">web_browser</a></p>