fixed mistakes

Author: Borovski Cergei

src/main/java/mate/academy/security/impl/AuthenticationServiceImpl.java

@@ -20,14 +20,14 @@ public User login(String email, String password) throws AuthenticationException
         final Optional<User> userFromDbOptional = userService.findByEmail(email);
         if (userFromDbOptional.isEmpty()) {
             throw new AuthenticationException("The user with email = "
-                    + email + "does not exist in the database");
+                    + email + " does not exist in the database");
         }
         final User user = userFromDbOptional.get();
         String hashedPassword = HashUtil.hashPassword(password, user.getSalt());
         if (user.getPassword().equals(hashedPassword)) {
             return user;
         }
-        throw new AuthenticationException("Password " + password + "is not correct");
+        throw new AuthenticationException("Password " + password + " is not correct");
     }
 
     @Override

src/main/java/mate/academy/util/HashUtil.java

@@ -27,7 +27,7 @@ public static String hashPassword(String password, byte[] salt) {
                 hashedPassword.append(String.format("%02x", b));
             }
         } catch (NoSuchAlgorithmException e) {
-            throw new IllegalStateException("Could`nt create hash using SHA 512 algorithm");
+            throw new IllegalStateException("Could not create hash using SHA 512 algorithm");
         }
         return hashedPassword.toString();
     }