GitHub request get a repository - ruby-on-rails

Question

How can I make a get request to a repository if my user hasn't generated a personal token and I have just the access token from authentication with oauth2?
I have tried some options with postman but I can't fix it.
I want to access a private repository
What I'm trying to do:
require "uri"
require "net/http"
url = URI("https://api.github.com/repos/username/repository_name")
https = Net::HTTP.new(url.host, url.port)
https.use_ssl = true
request = Net::HTTP::Get.new(url)
request["Authorization"] = "Bearer ACCESS_TOKEN"
request["Cookie"] = "_octo=GH1.1.1832634711.1663350372; logged_in=no"
response = https.request(request)
puts response.read_body

Answer 1

One of my collaborators resolve in this way, I hope to be helpful to someone else
def get_github_link
#group=Group.find(params[:id])
if current_user.gh_access_token.nil?
flash[:notice] = "You havn't your GithHub account linked, this is a private repository!"
redirect_to #group and return
end
if #group.status=="private"
url = URI.parse("https://api.github.com/repos/#{current_user.gh_username}/#{#group.git_repository}")
https = Net::HTTP.new(url.host, url.port)
https.use_ssl = true
request = Net::HTTP::Post.new(url)
request["Authorization"] = "token #{current_user.gh_access_token}"
request["Content-Type"] = 'application/json'
request["Accept"] = 'application/vnd.github+json'
request["Coockies"] = 'login-yes'
request.body = {owner: #group.user.gh_username}.to_json
response = https.request(request)
else
url = URI.parse("https://api.github.com/repos/#{#group.user.gh_username}/#{#group.git_repository}")
https = Net::HTTP.new(url.host, url.port)
https.use_ssl = true
request = Net::HTTP::Get.new(url)
request["Authorization"] = "token #{current_user.gh_access_token}"
request["Accept"] = 'application/vnd.github+json'
request.body = {owner: #group.user.gh_username}.to_json
response = https.request(request)
end
#url = URI.parse("https://api.github.com/repos/"+#group.git_url.remove("https://github.com/"))
json = JSON.parse(response.body, symbolize_names: true)
if eval(response.code.to_s) === 200
redirect_to #group.git_url, allow_other_host: true and return
else
flash[:notice] = "You have not the access to this repository, please conctact the admin"
redirect_to #group and return
end
end