Security-related question about a possible exposed credential

[Emma-NYL]

Hello,

My name is Emma, I am conducting an academic study on possible credential exposure in public GitHub repositories.

While analyzing this repository, I found a string that may represent a credential. I'm including the code snippet below containing possible leakage. To avoid exposing sensitive information publicly, I marked the sensitive information.

Could you please help clarify whether the detected string is:

1. a real credential, or
2. a placeholder / example value?

Thank you for your time.

---

Code snippet (sensitive values masked):

    describe '#refresh_oauth_token' do
      context 'with valid OAuth configuration' do
        before do
          email_account.settings = {
            oauth: {
              access_token: "curr****token",
              refresh_token: "refres****ken_123",
              expires_at: 1.hour.from_now.to_i
            }
          }
        end

Thank you in advance for your time - I really appreciate it!

Sincerely,
Emma