token file output feature

[WindzCUHK]

Description

• mode=init, fatal when ALL preset tokens failed

Type of change

• [ ] Bug fix
• [x] New feature
• [ ] Refactoring (no functional changes, no api changes)
• [ ] Non-code changes (update documentation, pipeline, etc.)

Flags

• [ ] Breaks backward compatibility
• [ ] Requires a documentation update
• [ ] Has untestable code

---

Checklist

• [x] Followed the guidelines in the CONTRIBUTING document
• [x] Added prefix [skip ci]/[ci skip]/[no ci]/[skip actions]/[actions skip] in the PR title if necessary
• [x] Tested and linted the code
• [x] Commented the code
• [x] Made corresponding changes to the documentation
• [ ] Passed all pipeline checking

Checklist for maintainer

• Use Squash and merge
• Double-confirm the merge message has prefix [skip ci]/[ci skip]/[no ci]/[skip actions]/[actions skip]
• Delete the branch after merge

[WindzCUHK]

expectation (not tested)

1. mode=init, fatal when ALL preset tokens failed
   1. mode=init, SOME preset fails => output valid tokens, exit code == 0

      ERROR[2024-03-05T20:06:27+09:00] Failed to refresh tokens: PostAccessTokenRequest failed for target [{user.windz.provider:role.self,,0,0}], err: 403 postaccesstokenrequest: principal user.windz.instance.mac is not included in the requested role(s) in domain user.windz.provider. Retrying in 5.226087174s
      ...
      INFO[2024-03-05T20:12:23+09:00] Token cache updated. accesstoken:success[1],error[1]; roletoken:success[1],error[1]
      ERROR[2024-03-05T20:07:08+09:00] Failed to fetch tokens after multiple retries: PostAccessTokenRequest failed for target [{user.windz.provider:role.self,,0,0}], err: 403 postaccesstokenrequest: principal user.windz.instance.mac is not included in the requested role(s) in domain user.windz.provider
      ...
      INFO[2024-03-05T20:20:03+09:00] [New Access Token] Domain: user.windz.provider, Role: dummy-role
      DEBUG[2024-03-05T20:20:03+09:00] Saving Access Token[741 bytes] at .local/user.windz.provider:role.dummy-role.accesstoken 
      INFO[2024-03-05T20:20:03+09:00] [New Role Token] Domain: user.windz.provider, Role: dummy-role
      DEBUG[2024-03-05T20:20:03+09:00] Saving Role Token[344 bytes] at .local/user.windz.provider:role.dummy-role.roletoken
      ...
      INFO[2024-03-05T20:07:08+09:00] Shutdown completed!

   2. mode=init, ALL preset fails => exit code == 1

      ERROR[2024-03-05T20:09:30+09:00] Failed to refresh tokens: PostAccessTokenRequest failed for target [{user.windz.provider:role.dummy-rolee,,0,0}], err: 403 postaccesstokenrequest: principal user.windz.instance.mac is not included in the requested role(s) in domain user.windz.provider. Retrying in 3.470331765s
      ...
      INFO[2024-03-05T20:12:23+09:00] Token cache updated. accesstoken:success[0],error[2]; roletoken:success[0],error[2]
      ...
      ERROR[2024-03-05T20:09:44+09:00] Failed to fetch tokens after multiple retries: PostAccessTokenRequest failed for target [{user.windz.provider:role.self,,0,0}], err: 403 postaccesstokenrequest: principal user.windz.instance.mac is not included in the requested role(s) in domain user.windz.provider
      ...
      ERROR[2024-03-05T20:12:23+09:00] Error starting token provider[Unable to fetch ANY tokens for init mode] 
      FATAL[2024-03-05T20:12:23+09:00] Unable to fetch ANY tokens for init mode