User Property

A username if authentication is to be used.


ANSI (Cross Platform)
char* GetUser();
int SetUser(const char* lpszUser); Unicode (Windows) LPWSTR GetUser();
INT SetUser(LPCWSTR lpszUser);
@property (nonatomic,readwrite,assign,getter=user,setter=setUser:) NSString* user;
- (NSString*)user;
- (void)setUser:(NSString*)newUser;
#define PID_MQTT_USER 56

IPWORKSMQ_EXTERNAL void* IPWORKSMQ_CALL IPWorksMQ_MQTT_Get(void *lpObj, int propid, int arridx, int *lpcbVal, int64 *lpllVal);
IPWORKSMQ_EXTERNAL int IPWORKSMQ_CALL IPWorksMQ_MQTT_Set(void *lpObj, int propid, int arridx, const void *val, int cbVal);

Default Value



This property can be set to a username if authentication is to be used.

In MQTT 3.1.1, while a User may be specified without a Password, setting a Password without a User is not supported; attempting to do so will cause the server to reject the connection attempt.

In MQTT 5, a Password may be set without a User, allowing the field to be used for credentials other than a password.

This property is not available at design time.

Data Type


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IPWorks MQ 2020 C++ Edition - Version 20.0 [Build 8162]