Config

ApplicationProperties.kt

package com.paul.config

import org.springframework.boot.context.properties.ConfigurationProperties
import org.springframework.boot.context.properties.ConstructorBinding


@ConfigurationProperties(prefix = "config")
@ConstructorBinding
data class ApplicationProperties(
     val internalServerError: String,
     val illegalArguments: String,
     val badRequest: String,
     val methodNotAllowed: String
)

SwaggerUIConfig.kt

package com.paul.config

import io.swagger.v3.oas.models.OpenAPI
import org.springframework.context.annotation.Bean
import org.springframework.context.annotation.Configuration

@Configuration
class SwaggerUIConfig {
    @Bean
    fun customOpenApi(): OpenAPI{
        return OpenAPI()
    }
}