Fix incorrect quoting in v-generate-api-key

bin/v-generate-api-key

@@ -13,7 +13,7 @@ keygen()
 {
     < /dev/urandom tr -dc _A-Z-a-z-0-9 | head -c${1:-32};echo;
 }
-KEYS='$HESTIA/data/keys/'
+KEYS="$HESTIA/data/keys/"
 HASH=$(keygen)
 
 
@@ -22,7 +22,7 @@ HASH=$(keygen)
 #----------------------------------------------------------#
 
 if [ ! -d ${KEYS} ]; then
-  mkdir ${KEYS}
+  mkdir -p ${KEYS}
 fi
 
 if [[ -e ${KEYS}${HASH} ]] ; then