read application.yml properties from specific profile - spring-boot

Question

We have some default secrets set in our application.yml that are used in environments such as development and tests etc:
application.yml
spring.profiles.default: development
spring.profiles.active: development
foo:
secret: admin
---
spring:
config.activate.on-profile: test
logging:
level.root: DEBUG
---
spring:
config.activate.on-profile: production
logging:
level.root: INFO
Now, in our production environment we overwrite the secrets by setting environment variables.
However, we want to ensure that our application fails booting if any secret from the application.yml was not properly overwritten by environment variables, to prevent default secrets in production.
For now we check it like this:
#Profile("production")
#Validated
#Configuration
#ConfigurationProperties("foo")
class FooConfigSecrets {
class FooConfigSecrets(
private val environment: Environment,
) {
lateinit var secret: String
#AssertTrue
fun isSecretValid(): Boolean {
if (isNotProductionEnvironment()) return true
// How can we lookup the value set in application.yml (`admin`) in `production` environment instead of hard coding it?
return secret isSecretSetAndNotDefault(secret.user.name, "admin")
}
fun isSecretSetAndNotDefault(secret: String, default: String): Boolean {
return StringUtils.hasText(secret) &&
!(secret.startsWith("\${") && secret.endsWith("}")) &&
secret != default
}
fun isNotProductionEnvironment() = !environment.activeProfiles.contains("production")
}
That works fine, but if anyone ever changes the default password from admin to e.g. test, it is easily missed to also update it in this validation class. Hence, I am wondering, how we could lookup the secret's default value admin instead of hard coding it?