Current Behavior

When I use yaml config to set plugin properties, apisix openid-connect plugin could not read $env://KEYCLOAK_PWDvalue.
Environment variable can be seen through linux cmd:

echo $KEYCLOAK_PWD

But apisix plugin could not read those config properties

Expected Behavior

Apisix plugin can read those config properties

Error Logs

No response

Steps to Reproduce

1. Create config(Show only key code)

  - uri: /api/xxx/*
    service_id: xxxx
    plugins:
      openid-connect:
        client_id: xxx
        client_secret: $ENV://KEYCLOAK_PWD
        discovery: xxxx
        scope: openid

Environment

• APISIX version (3.2.0):
• Operating system (Linux 3.10.0-1160.118.1.el7.x86_64 SMP Thu Apr 4 03:33:23 EDT 2024 x86_64 x86_64 x86_64 GNU/Linux):
• OpenResty / Nginx version (openresty/1.21.4.2):
• etcd version, if relevant (not use):
• APISIX Dashboard version, if relevant(not use)