The new password for the DB instance master user. Can be any printable ASCII character except "/", """, or "@". Changing this parameter does
            not result in an outage and the change is asynchronously applied as soon as possible. Between the time of the request and the completion of
            the request, the 
MasterUserPassword element exists in the 
PendingModifiedValues element of the operation response. Default:
            Uses existing setting Constraints: Must be 8 to 41 alphanumeric characters (MySQL), 8 to 30 alphanumeric characters (Oracle), or 8 to 128
            alphanumeric characters (SQL Server). 
|  Note: | 
|---|
| Amazon RDS API actions never return the password, so this action provides a way to regain
            access to a master instance user if the password is lost. | 

 Declaration Syntax
public string MasterUserPassword { get; set; }Assembly: 
AWSSDK (Module: AWSSDK) Version: 1.5.60.0 (1.5.60.0)