No matter how you store it, a hacker that has access to your server will always be able to get it one way or another. If you have it in you app as clear text or as a constant don’t really matter. It can be reverse engineered. What’s more important is how secure your server is
Someone connecting to your app do not have access to the binary executable that is your app so they can not get/see the password.
Use obfuscation on your important strings. Arbed has obfuscation built in to it (on sale now as part of the XJ Bundle). We also have a free utility http://www.bkeeney.com/obfuscate/.