Gets the authorization string required to access the protected resource.
This method performs several operations automatically depending on the value of ClientProfile. Please see the introduction section for the OAuth class for a detailed overview of the typical scenarios.
After authorization is completed this method will return the authorization string which can be passed directly to the Authorization property of any other component. This can also be passed as the value of the HTTP Authorization header to other implementations that access the protected resource as well.
This method returns a String value; after it returns, call the GetLastErrorCode() method to obtain its result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message.