diff --git a/OpenVPN Adapter/OpenVPNCredentials.h b/OpenVPN Adapter/OpenVPNCredentials.h
index 7a2af91..6c310c8 100644
--- a/OpenVPN Adapter/OpenVPNCredentials.h	
+++ b/OpenVPN Adapter/OpenVPNCredentials.h	
@@ -8,6 +8,46 @@
 
 #import <Foundation/Foundation.h>
 
+/**
+ Class used to pass credentials
+ */
 @interface OpenVPNCredentials : NSObject
 
+/**
+ Client username
+ */
+@property (nullable, nonatomic) NSString *username;
+
+/**
+ Client password
+ */
+@property (nullable, nonatomic) NSString *password;
+
+/**
+ Response to challenge
+ */
+@property (nullable, nonatomic) NSString *response;
+
+/**
+ Dynamic challenge/response cookie
+ */
+@property (nullable, nonatomic) NSString *dynamicChallengeCookie;
+
+/**
+ If YES, on successful connect, we will replace the password
+ with the session ID we receive from the server (if provided).
+ If NO, the password will be cached for future reconnects
+ and will not be replaced with a session ID, even if the
+ server provides one.
+ */
+@property (nonatomic) BOOL replacePasswordWithSessionID;
+
+/**
+ If YES, and if replacePasswordWithSessionID is YES, and if
+ we actually receive a session ID from the server, cache
+ the user-provided password for future use before replacing
+ the active password with the session ID.
+ */
+@property (nonatomic) BOOL cachePassword;
+
 @end
diff --git a/OpenVPN Adapter/OpenVPNCredentials.mm b/OpenVPN Adapter/OpenVPNCredentials.mm
index 04b8a42..5c7bbf6 100644
--- a/OpenVPN Adapter/OpenVPNCredentials.mm	
+++ b/OpenVPN Adapter/OpenVPNCredentials.mm	
@@ -27,6 +27,52 @@ using namespace openvpn;
 
 @implementation OpenVPNCredentials
 
+- (NSString *)username {
+    return !_credentials.username.empty() ? [NSString stringWithUTF8String:_credentials.username.c_str()] : nil;
+}
 
+- (void)setUsername:(NSString *)username {
+    _credentials.username = username ? std::string([username UTF8String]) : "";
+}
+
+- (NSString *)password {
+    return !_credentials.password.empty() ? [NSString stringWithUTF8String:_credentials.password.c_str()] : nil;
+}
+
+- (void)setPassword:(NSString *)password {
+    _credentials.password = password ? std::string([password UTF8String]) : "";
+}
+
+- (NSString *)response {
+    return !_credentials.response.empty() ? [NSString stringWithUTF8String:_credentials.response.c_str()] : nil;
+}
+
+- (void)setResponse:(NSString *)response {
+    _credentials.response = response ? std::string([response UTF8String]) : "";
+}
+
+- (NSString *)dynamicChallengeCookie {
+    return !_credentials.dynamicChallengeCookie.empty() ? [NSString stringWithUTF8String:_credentials.dynamicChallengeCookie.c_str()] : nil;
+}
+
+- (void)setDynamicChallengeCookie:(NSString *)dynamicChallengeCookie {
+    _credentials.dynamicChallengeCookie = dynamicChallengeCookie ? std::string([dynamicChallengeCookie UTF8String]) : "";
+}
+
+- (BOOL)replacePasswordWithSessionID {
+    return _credentials.replacePasswordWithSessionID;
+}
+
+- (void)setReplacePasswordWithSessionID:(BOOL)replacePasswordWithSessionID {
+    _credentials.replacePasswordWithSessionID = replacePasswordWithSessionID;
+}
+
+- (BOOL)cachePassword {
+    return _credentials.cachePassword;
+}
+
+- (void)setCachePassword:(BOOL)cachePassword {
+    _credentials.cachePassword = cachePassword;
+}
 
 @end