Add needed validation

Author: flexable777

build.gradle.kts

@@ -28,6 +28,7 @@ dependencies {
     implementation("org.springframework.boot:spring-boot-starter-actuator")
     implementation("org.springframework.boot:spring-boot-starter-webflux")
     implementation("org.springframework.boot:spring-boot-starter-data-jpa")
+    implementation("org.springframework.boot:spring-boot-starter-validation")
 
     implementation("no.nav.security:token-validation-spring:$tokenValidationVersion")