Generate Access Token
POST https://api.imgur.com/oauth2/token
Given a user's refresh token, this endpoint generates an access token.
Request Body
[{"name"=>"refresh_token", "value"=>"{{refreshToken}}", "datatype"=>"string"}, {"name"=>"client_id", "value"=>"{{clientId}}", "datatype"=>"string"}, {"name"=>"client_secret", "value"=>"{{clientSecret}}", "datatype"=>"string"}, {"name"=>"grant_type", "value"=>"refresh_token", "datatype"=>"string"}]