VK api where is the error?

Question

PHP

Good evening!
Tell me why there is an error when working with the API.
I received a token, it turns out to check a personal message using it:

' https://api.vk.com/method/messages.get?access_token= ' + AT

But when trying to send a message:

' https://api.vk.com/method/messages.send?access_token= ' + AT + '?user_id=13897175?message=' + str(i)

an error occurs:

{"error":{"error_code":5,"error_msg":"User authorization failed: invalid access_token (4).","request_params":[{"key":"oauth","value":"1" },{"key":"method","value":"messages.send"}]}}

Why is this situation happening? How to write a request correctly?

Answer 1

Separate GET parameters with &

https://api.vk.com/method/messages.send?access_token=' + AT + '&user_id=13897175&message=' + str(i)

Answer 2

You've been told what's wronginvalid access_token

Answer 3

Try moving the access_token to the very end of the URL

Answer 4

0 <= count ? <= 1
0 <= count &