'base64_encode' was not declared in this scope

Hi Folks,

I am working on one use case where i am using Base64 library from

GitHub - adamvr/arduino-base64: A base64 library for the arduino platform, written in C.

But it is throwing error: 'base64_encode' was not declared in this scope
base64_encode(temp,(char*)c_nonce,32);
even I have added library in libraries folder

This is the Code, It will be great if you help me

ATSHA_UseCase.ino (13.7 KB)

Please do not hijack. Thread split.

Post the EXACT error message, which will include the name of the file being compiled, the line number where the error is, and the exact error message. Your paraphrase is useless.