401 Unauthorized — Invalid grant when requesting refresh token in Doorkeeper
问题 I'm having a trouble in requesting a refresh token, it keep returning an Unauthorized 401 error. I don't know if I'm lacking a parameters that I passed when I did a request. I added the doorkeeper configuration for refresh token. use_refresh_token Here's the request details: {{root_url}}/oauth/token {"refresh_token"=>"034a74c085219fb8297fd8ef9b59f080918f" "format"=>:json, "controller"=>"/oauth/tokens", "action"=>"create", "grant_type"=>"refresh_token", "client_id"=>"<client_id>", "client