Environment variable inside oai macro

[Selveris]

As the title says, I want to use environment variables inside the oai macro, or any other way allowing me to not hard-code the string.

To give some context here is the code where I need it

45 #[derive(Debug, SecurityScheme)]
46 #[oai(
47     ty = "openid_connect",
48     key_in = "header",
49     key_name = "authorization",
50     flows(authorization_code(
51         authorization_url = "http://localhost:8888/realms/test/protocol/openid-connect/auth",
52         token_url = "http://localhost:8888/realms/test/protocol/openid-connect/token",
53         refresh_url = "http://localhost:8888/realms/test/protocol/openid-connect/token",
54         scopes = "OpenIdScopes"
55     )),
56     openid_connect_url = std::env::var("OPENID_URL").unwrap(),
57     checker = "keycloak_checker"
58 )]
59 pub struct OpenIdAuth(UserInfo);

At line 56 is an example of what I would like to use and on line 51 to 53 what I currently have to do.

Is there any way to make it possible?
If the answer is no, future feature?