Implement AutoCloseable

src/main/java/de/stklcode/jvault/connector/HTTPVaultConnector.java

@@ -67,7 +67,7 @@ public class HTTPVaultConnector implements VaultConnector {
     private final String baseURL;           /* Base URL of Vault */
     private final SSLContext sslContext;    /* Custom SSLSocketFactory */
     private final int retries;              /* Number of retries on 5xx errors */
-    private final Integer timeout;              /* Timeout in milliseconds */
+    private final Integer timeout;          /* Timeout in milliseconds */
 
     private boolean authorized = false;     /* authorization status */
     private String token;                   /* current token */
@@ -610,6 +610,13 @@ public class HTTPVaultConnector implements VaultConnector {
         return createTokenInternal(token, PATH_TOKEN + PATH_CREATE + "/" + role);
     }
 
+    @Override
+    public void close() {
+        authorized = false;
+        token = null;
+        tokenTTL = 0;
+    }
+
     /**
      * Create token.
      * Centralized method to handle different token creation requests.

src/main/java/de/stklcode/jvault/connector/VaultConnector.java

@@ -30,7 +30,7 @@ import java.util.*;
  * @author Stefan Kalscheuer
  * @since 0.1
  */
-public interface VaultConnector {
+public interface VaultConnector extends AutoCloseable {
     String PATH_SECRET = "secret";
 
     /**