Users
    
        Interface to change the password of a system user.
    
    File information
    
    Classes
    IUsers
    class IUsers {
public:
    static users_password_change_error_t ChangePassword(const char * user, const char * oldPassword, const char * newPassword);;
};
    Public functions
    ChangePassword (static function)
    
        - 
            This function changes the password of a given user. The old and the new password must be both provided.
            
Parameters
            
                | const char * user  | The system user which must exist | 
                | const char * oldPassword  | The old password of the system user | 
                | const char * newPassword  | The desired new password | 
            
            Return value
            If the password is successfully changed USERS_PASSWORD_CHANGE_SUCCESS is returned.
            Code Example
            users_password_change_error_t error = IUsers::ChangePassword("root", "topSecret", "superTopSecret");
                
         
    
    Data types
    users_password_change_error_t
    typedef enum {
    USERS_PASSWORD_CHANGE_SUCCESS = 0,
    USERS_PASSWORD_CHANGE_PAM,
    USERS_PASSWORD_CHANGE_AUTHENTICATION,
    USERS_PASSWORD_CHANGE_ACCOUNT,
    USERS_PASSWORD_CHANGE_FAILURE
} users_password_change_error_t;
    Overview
    The enum users_password_change_error_t is an error enum which can be used to check if changing the passowrd was a success or a failure.
    Values
    
        | USERS_PASSWORD_CHANGE_SUCCESS |  The password was changed successfully | 
        | USERS_PASSWORD_CHANGE_PAM | Error: A PAM (Pluggable Authentication Modules Library) transcation could not be created | 
        | USERS_PASSWORD_CHANGE_AUTHENTICATION | Error: The system user could not be authenticated | 
        | USERS_PASSWORD_CHANGE_ACCOUNT | Error: The user account might not be valid | 
        | USERS_PASSWORD_CHANGE_FAILURE | Error: The password could not be changed |