Long Refresh Tokens cause exception when saving in Windows Credential Store

[Kyrodan]

Winodws Credential Store's maximum secret length is 512 bytes. Some Refresh Tokens (like Amazon Drive) may exceed this limit and so causing an Exception.

Maybe saving credentials to Windows Credential Store should be replaced by a better and Mono compatible alternative (like using https://msdn.microsoft.com/en-us/library/system.security.cryptography.protecteddata.aspx, which is also supported in Mono).

[Kyrodan]

reference #18 Mono Support

[Kyrodan]

reference #10 Access to Amazon Cloud Drive