I am trying to get access token through API, for that I first need to hit this url https://account.box.com/api/oauth2/authorize I have also given a redirecturl, with my client id and client secret, it is supposed to return a code and that code is required by this url endpoint https://api.box.com/oauth2/token to generate access token
ISSUE:
When I hit the request it opens the browser and gives this error 

There seems to be a problem with this app.

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Error: redirect_uri_mismatch