Integrate users and books

- new table userbook linking users and book
- moved rating to users book
- updated demo data and tests
- updated front to hide routes from non connected users

internal/middleware/auth.go

@@ -1,7 +1,6 @@
 package middleware
 
 import (
-	"fmt"
 	"net/http"
 	"strings"
 
@@ -20,7 +19,6 @@ func Auth() gin.HandlerFunc {
 
 		username, err := parseUserFromJwt(c)
 		if err != nil {
-			fmt.Println(err)
 			c.AbortWithStatusJSON(http.StatusUnauthorized,
 				gin.H{"error": "You must be logged in to access this resource."})
 		} else {