Widen API to allow storing keychain entries for an authenticated user

src/main/java/org/cryptomator/integrations/keychain/KeychainAccessProvider.java

@@ -58,6 +58,22 @@ default void storePassphrase(String key, CharSequence passphrase) throws Keychai
  @Blocking
  void storePassphrase(String key, @Nullable String displayName, CharSequence passphrase) throws KeychainAccessException;
 
+ /**
+ * Associates a passphrase with a given key and a name for that key. Other than
+ * {@link #storePassphrase(String key, String displayName, CharSequence passphrase)}, the user needs to authenticate
+ * to store a passphrase. The authentication mechanism is provided by the operating system dependent
+ * implementations of this API.
+ *
+ * @param key Key used to retrieve the passphrase via {@link #loadPassphrase(String)}.
+ * @param displayName The according name to the key. That's the name of the vault displayed in the UI.
+ * It's passed to the keychain as an additional information about the vault besides the key.
+ * The parameter does not need to be unique or be checked by the keychain.
+ * @param passphrase The secret to store in this keychain.
+ * @throws KeychainAccessException If storing the password failed
+ */
+ @Blocking
+ void storePassphraseForAuthenticatedUser(String key, @Nullable String displayName, CharSequence passphrase) throws KeychainAccessException;
+
  /**
  * @param key Unique key previously used while {@link #storePassphrase(String, String, CharSequence)} storing a passphrase}.
  * @return The stored passphrase for the given key or <code>null</code> if no value for the given key could be found.