Build auth provider

src/main/java/net/Broken/Api/Security/DiscordAuthenticationProvider.java

@@ -0,0 +1,18 @@
+package net.Broken.Api.Security;
+
+import org.springframework.security.authentication.AuthenticationProvider;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.AuthenticationException;
+
+public class DiscordAuthenticationProvider implements AuthenticationProvider {
+    @Override
+    public Authentication authenticate(Authentication authentication) throws AuthenticationException {
+        authentication.getCredentials()
+        return null;
+    }
+
+    @Override
+    public boolean supports(Class<?> authentication) {
+        return false;
+    }
+}

src/main/java/net/Broken/Api/Services/DiscordOauthService.java

@@ -0,0 +1,46 @@
+package net.Broken.Api.Services;
+
+import com.google.gson.Gson;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Service;
+
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.util.HashMap;
+
+@Service
+public class DiscordOauthService {
+
+    @Value("${discord.client-id}")
+    private String clientId;
+
+    @Value("${discord.client-secret}")
+    private String clientSecret;
+
+    @Value("${discord.token-endpoint}")
+    private String tokenEndpoint;
+
+    public String getAccessToken(String code, String redirectUrl){
+        HashMap<String, String> data = new HashMap<>();
+        data.put("client_id", this.clientId);
+        data.put("client_secret", this.clientSecret);
+        data.put("grant_type", "authorization_code");
+        data.put("code", code);
+        data.put("redirect_uri", redirectUrl);
+
+        Gson gson = new Gson();
+        HttpRequest.BodyPublisher body = HttpRequest.BodyPublishers.ofString(gson.toJson(data));
+
+
+        HttpRequest request = HttpRequest.newBuilder()
+                .uri(URI.create(tokenEndpoint))
+                .header("Content-Type", "application/json")
+                .POST(body)
+                .build();
+        HttpClient client = HttpClient.newHttpClient();
+        client.send(request, HttpResponse.BodyHandlers.ofString());
+
+    }
+}

src/main/resources/application.yml

@@ -34,3 +34,8 @@ server:
   port: ${PORT}
   http2:
     enabled: 'true'
+
+discord:
+  client-id: ${CLIENT_ID}
+  client-secret: ${CLIENT_SECRET}
+  token-endpoint: https://discord.com/api/oauth2/token