html - Ruby on Rails redirect_to method -

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let's have line in controller 

redirect_to "/sessions/try", provider: 5

and try.html.erb

<h1>try</h1> <%= provider %>

obviously doesn't work, how 'provider' show in html file?

send provider params

redirect_to "/sessions/try?provider=5"

than at, try.html.erb

<h1>try</h1> <%= params[:provider] %>

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