added files being worked on

src/main/java/dev/rexijie/oauth/oauth2server/keys/ApplicationKeySource.java

@@ -0,0 +1,7 @@
+package dev.rexijie.oauth.oauth2server.keys;
+
+import com.nimbusds.jose.jwk.source.JWKSecurityContextJWKSet;
+
+public class ApplicationKeySource extends JWKSecurityContextJWKSet {
+
+}

src/main/java/dev/rexijie/oauth/oauth2server/keys/context/KeyContext.java

@@ -0,0 +1,19 @@
+package dev.rexijie.oauth.oauth2server.keys.context;
+
+import com.nimbusds.jose.jwk.JWK;
+import com.nimbusds.jose.proc.JWKSecurityContext;
+
+import java.util.List;
+
+public class KeyContext extends JWKSecurityContext {
+
+    /**
+     * Constructs a {@code JWKSecurityContext} with the provided
+     * parameters.
+     *
+     * @param keys The list of keys.
+     */
+    public KeyContext(List<JWK> keys) {
+        super(keys);
+    }
+}

src/main/java/dev/rexijie/oauth/oauth2server/token/granter/CompositeTokenGranter.java

@@ -30,7 +30,8 @@ public CompositeTokenGranter(TokenServices tokenServices,
         this.tokenGranterMap = Collections.synchronizedMap(Map.of(
                 AuthorizationGrantType.PASSWORD, new ResourceOwnerPasswordCredentialsTokenGranter(tokenServices, userAuthenticationManager),
                 AuthorizationGrantType.AUTHORIZATION_CODE, new AuthorizationCodeTokenGranter(tokenServices, authorizationCodeServices),
-                AuthorizationGrantType.CLIENT_CREDENTIALS, new ClientCredentialsTokenGranter(tokenServices, clientAuthenticationManager)
+                AuthorizationGrantType.CLIENT_CREDENTIALS, new ClientCredentialsTokenGranter(tokenServices, clientAuthenticationManager),
+                AuthorizationGrantType.REFRESH_TOKEN, new RefreshTokenGranter(tokenServices)
         ));
     }
 

src/main/java/dev/rexijie/oauth/oauth2server/token/granter/RefreshTokenGranter.java

@@ -0,0 +1,25 @@
+package dev.rexijie.oauth.oauth2server.token.granter;
+
+import dev.rexijie.oauth.oauth2server.api.domain.AuthorizationRequest;
+import dev.rexijie.oauth.oauth2server.services.token.TokenServices;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.oauth2.core.OAuth2Token;
+import reactor.core.publisher.Mono;
+
+// TODO (Implement)
+public class RefreshTokenGranter implements TokenGranter {
+
+    public RefreshTokenGranter(TokenServices tokenServices) {
+
+    }
+
+    @Override
+    public Mono<AuthorizationRequest> validateRequest(Authentication authentication, AuthorizationRequest authorizationRequest) {
+        return null;
+    }
+
+    @Override
+    public Mono<OAuth2Token> grantToken(Authentication authentication, AuthorizationRequest authorizationRequest) {
+        return null;
+    }
+}

src/test/java/dev/rexijie/oauth/oauth2server/api/constants/Endpoints.java

@@ -0,0 +1,9 @@
+package dev.rexijie.oauth.oauth2server.api.constants;
+
+public interface Endpoints {
+    String OAUTH_BASE_PATH = "/oauth";
+    String OIDC_BASE = "/openid";
+    String API_BASE = "/api";
+    String CLIENT_API_BASE = "/clients";
+    String USER_API_BASE = "/users";
+}