rbnacl private key
key = RbNaCl::Random.random_bytes(RbNaCl::SecretBox.key_bytes) # bunch of bytes
secret_box = RbNaCl::SecretBox.new(key) #This works
#But
key = ENV.fect("PRIVATE_KEY")
secret_box = RbNaCl::SecretBox.new(key) # blah blah blach errors