Pass the optional and required parameters as per the official API docs. See the DTO reference below for more information. 
package com.example.myapp;

import com.unkey.unkeysdk.dto.KeyDeleteRequest;

@RestController
public class APIController {

    private static IKeyService keyService = new KeyService();

    @DeleteMapping("/delete")
    public ResponseEntity<String> updateKey(
            @RequestBody KeyDeleteRequest keyId,
            @RequestHeader("Authorization") String authToken) {
        // Delegate the creation of the key to the KeyService
        return keyService.deleteKey(authToken, keyId);
    }
}

​
DTOs Reference

The DTOs used in the code for a better understanding of request and response bodies.

​
Request

public class KeyDeleteRequest {
    private String keyId;
}

​
Response

“OK”