pm2 plus authentication error

What's going wrong?

pm2 plus command shows error

[PM2 I/O] Authenticating ...
[PM2 I/O] Unexpected error : Missing mandatory field refresh_token to make a POST request on /api/oauth/token

How could we reproduce this issue?

pm2 plus and login

Supporting information

$ pm2 report

--- PM2 report ----------------------------------------------------------------
Date                 : Sat Dec 18 2021 10:58:20 GMT+0000 (Coordinated Universal Time)
===============================================================================
--- Daemon -------------------------------------------------
pm2d version         : 5.1.2
node version         : 16.5.0
node path            : /home/ec2-user/.nvm/versions/node/v16.5.0/bin/pm2
argv                 : /home/ec2-user/.nvm/versions/node/v16.5.0/bin/node,/home/ec2-user/.nvm/versions/node/v16.5.0/lib/node_modules/pm2/lib/Daemon.js
argv0                : node
user                 : ec2-user
uid                  : 1000
gid                  : 1000
uptime               : 5min
===============================================================================
--- CLI ----------------------------------------------------
local pm2            : 5.1.2
node version         : 16.5.0
node path            : /home/ec2-user/.nvm/versions/node/v16.5.0/bin/pm2
argv                 : /home/ec2-user/.nvm/versions/node/v16.5.0/bin/node,/home/ec2-user/.nvm/versions/node/v16.5.0/bin/pm2,report
argv0                : node
user                 : ec2-user
uid                  : 1000
gid                  : 1000
===============================================================================
--- System info --------------------------------------------
arch                 : x64
platform             : linux
type                 : Linux
cpus                 : Intel(R) Xeon(R) CPU E5-2676 v3 @ 2.40GHz
cpus nb              : 1
freemem              : 217161728
totalmem             : 1030275072
home                 : /home/ec2-user
===============================================================================
--- PM2 list -----------------------------------------------
┌─────┬─────────┬─────────────┬─────────┬─────────┬──────────┬────────┬──────┬───────────┬──────────┬──────────┬──────────┬──────────┐
│ id  │ name    │ namespace   │ version │ mode    │ pid      │ uptime │ ↺    │ status    │ cpu      │ mem      │ user     │ watching │
├─────┼─────────┼─────────────┼─────────┼─────────┼──────────┼────────┼──────┼───────────┼──────────┼──────────┼──────────┼──────────┤
│ 0   │ auth    │ default     │ 2.0.0   │ cluster │ 16304    │ 5m     │ 0    │ online    │ 0.1%     │ 53.5mb   │ ec2-user │ enabled  │
│ 1   │ auth    │ default     │ 2.0.0   │ cluster │ 16305    │ 5m     │ 0    │ online    │ 0.1%     │ 53.6mb   │ ec2-user │ enabled  │
└─────┴─────────┴─────────────┴─────────┴─────────┴──────────┴────────┴──────┴───────────┴──────────┴──────────┴──────────┴──────────┘
[PM2][WARN] Current process list is not synchronized with saved list. App auth_test auth_test differs. Type 'pm2 save' to synchronize.
===============================================================================
--- Daemon logs --------------------------------------------
/home/ec2-user/.pm2/pm2.log last 20 lines:
PM2        | 2021-12-18T10:53:12: PM2 log: [Watch] Start watching auth
PM2        | 2021-12-18T10:53:12: PM2 log: App [auth:1] starting in -cluster mode-
PM2        | 2021-12-18T10:53:13: PM2 log: App [auth:0] online
PM2        | 2021-12-18T10:53:13: PM2 log: [Watch] Start watching auth_test
PM2        | 2021-12-18T10:53:13: PM2 log: App [auth_test:2] starting in -cluster mode-
PM2        | 2021-12-18T10:53:13: PM2 log: App [auth:1] online
PM2        | 2021-12-18T10:53:13: PM2 log: [Watch] Start watching auth_test
PM2        | 2021-12-18T10:53:13: PM2 log: App [auth_test:3] starting in -cluster mode-
PM2        | 2021-12-18T10:53:14: PM2 log: App [auth_test:2] online
PM2        | 2021-12-18T10:53:14: PM2 log: App [auth_test:3] online
PM2        | 2021-12-18T10:55:01: PM2 log: [Watch] Stop watching auth_test
PM2        | 2021-12-18T10:55:01: PM2 log: Stopping app:auth_test id:2
PM2        | 2021-12-18T10:55:01: PM2 log: [Watch] Stop watching auth_test
PM2        | 2021-12-18T10:55:01: PM2 log: Stopping app:auth_test id:3
PM2        | 2021-12-18T10:55:01: PM2 log: App name:auth_test id:2 disconnected
PM2        | 2021-12-18T10:55:01: PM2 log: App [auth_test:2] exited with code [0] via signal [SIGINT]
PM2        | 2021-12-18T10:55:01: PM2 log: App name:auth_test id:3 disconnected
PM2        | 2021-12-18T10:55:01: PM2 log: App [auth_test:3] exited with code [0] via signal [SIGINT]
PM2        | 2021-12-18T10:55:01: PM2 log: pid=16326 msg=process killed
PM2        | 2021-12-18T10:55:01: PM2 log: pid=16332 msg=process killed

Start by running the reported pm2 plus login flow with PM2 5.1.2 and reviewing the authentication request that produces the missing refresh_token error. Done means the command can authenticate successfully without that error; the issue provides no file or test entry point.